Eira is also shown to be proficient in using magic such as the ritual to drain energy from body parts which didn't appear human to make them appear human again, healing spells, teleportation magic, as well as defensive magic to protect herself as well as her servants from powerful attacks.
Eira has exceptional demonic power even for a High-Class Devil. It is noted that even without training, Eira has the potential to become a Devil of the highest class relying solely on natural talent alone. After placing binding marks on the members of her Peerage and marrying her mark to Takumi and becoming a true Succubus, Eira boasts an amount of Demonic Power which puts her on par with Ultimate-Class Devils.
A type of demonic energy that allows her to release energies that can disintegrate matter, both living and inanimate, with relative ease. She is further able to control the shape and power of the technique such as creating multiple softball sized bullets to lessen the destructive force yet increase the range of her attack. Going as far as to combine her use of the Power of Destruction with other forms of magic in order to change its potency, range, and force and even helping it to become comparable to purer forms of it.
Eira's status as a Succubus comes with an assortment of strengths and weaknesses. She is able to feed from emotions, harbor powers and even alter her own physical features to suit the needs of a situation. She is seen as universally beautiful and physically perfect. When utilizing Succubus related abilities her aura becomes that of neigh irresistible sex appeal. Being a Succubus makes her favor the strong-willed as a matter of genetics, as the strong-willed are said to be harder to break and thus more long term fun for the Succubus to feed from. In actuality, the strong-willed are less likely to die from frequent feedings and as such make better mates for Succubus (Thought to be true based on the male counterpart, the Incubus). When a Succubus finds the sort of strong-willed individual they like most, they become attached quickly, selfish of the time spent with them and demanding of their attention, even if they haven't previously shown such leanings. Beyond the good it gives, a Succubus physiology makes it so that any kind of power or contact she receives becomes the standard for the type she can take. For instance, if she choosing to feed on powerful emotions, she will continue to do so. Not feeding this way for extended periods of time could have negative consequences for the lass. As such, she demonstrates great care in what she chooses to do and how she chooses to do it. Eira doesn't escalate her abilities unless there is dire need for it.
Sexual Control: Eira has an immense amount of control over the aspects of her own body associated with sex and those of her partner. She can force her partner to climax with her, absorbing their fluids and life energy while mixing it with her own and marking them as hers. Beyond this if she chooses, subconsciously or consciously she can absorb those fluids completely, changing them to energy and controlling when she can or cannot get pregnant. In being in touch with her Succubus powers for the first time, Eira has gained an intense understanding of how pleasure works in the body and can even harness it to be used against others if she needs to.
Pheromone Manipulation: Eira has the ability to secrete pheromones from her body which have various effects on the people around her. The effects of these chemicals seem to be directly related to what she wants to be happening around her, meaning her desires affect the outcome. This isn't necessarily connected to how she feels directly, but mostly it is linked to how she wants other people to feel around her. She has used this power subconsciously to make friends, she's also used it to incidentally stir extra desire in Takumi (whether it was actually needed or not). This isn't only linked to things like what she exhales, or pushes out of her pores but also simple things like contact with her bodily fluids like her saliva, blood, etc. Her Succubus physiology makes it so that contact with these things can make its 'victims' want to please her sexually once they've tasted her (such was the case with Takumi and accidentally the vampire Adrian who ingested her blood). It is also apart of her binding marks, and keeps other Succubi and Incubi from wanting to approach those she marks as food for herself. She can also use it to nullify the fighting spirits of those around her. She can produce this through her power on a massive scale with an active desire to use it, but she's shown no such inclination. Unlike the thoughts of most, it seems that Eira's power effects people regardless of their gender, male and female creatures are drawn to her and even those without definitive sex characteristics.
Cambion Conception: As a Succubus, Eira possesses a unique previously unknown ability to help spawn life out of apparent nothingness. The creation of such a being requires Eira to give a portion of the energy she obtains through intercourse to the creation of the beings body and power. If she does this, even without realizing it is something she's doing, she can spawn a new life independent of the energies that have gone into making it. Such an ability is why Succubi of old were said to have created hordes of Devils, and has been forgotten with the lack of Succubi births, such a child is referred to as a Calamity Child. Strangely, it almost seems to uniquely work in conjunction with Takumi's Dragon Powers.
Nude Healing: Eira has the ability to heal anyone with skin contact. The act of doing so seems to drain her energy and requires her to maintain some amount of nudity but is a handy way to heal. After large scale battles she's known to invite participating members of her peerage over to her apartment for a sleepover to speed up their healing processes.
Cloth Manipulation: When Eira needs to she can use her magic power to manipulate clothing. She does this to change outfits and repair damages to her physical attire. Her ability to manipulate cloth, isn't limited to her own clothing and she can do it for anyone she chooses. Most often she does this for the members of her peerage when they are attending parties or the like, she is also prone to doing this to dress herself when she can't be bothered with clothing. Using her magic, her clothing created is of the highest quality, and it has been mentioned that she makes the most magnificent clothing one can wear.
Emotion Absorption: Eira has the uncanny ability to neutralize some of the more aggressive emotions that people can have. Doing this seems to leave people in a state of calm. She enacts this power through physical contact, most generally seen as a hug. Doing this seems to give her an influx of power, while allowing those around her to think with a clearer mind. She is usually seen doing this to the members of her peerage when they're upset.
Memory Alteration: Eira has shown that she has skills in memory alteration using it on Takumi's Bullies. It is stated by Eira at some point that she's also used this on a couple of other people to rid them of memories of her that they didn't wish to keep.
Energy Drain: Eira has the ability to physically drain the energy from a person or object (given the object isn't a holy one associated with the God of the Bible). Sometimes she uses this to remove curses from objects as part of her contracts, she can also use it to navigate magical spaces by using it in a manner similar to sonar. Most recently she's been seen using this ability to drain the Dragon Energy from Takumi's arm to leave it with its original human appearance. Doing this seems to allow her to directly ingest the power she steals. According to her, these powers have different tastes, and different strengths. Dragon energy in large quantities can make her power drunk, giving her the side effects of intoxication.
Gentle Fist A fighting style developed by Eira to use as an offshoot of her ability to drain energy. Strikes of her hands, palms or even fingers to other people's bodies allows her to manipulate the flow of their energy. For instance, if she used this ability while touching someone's elbow she'd stop the flow of energy to their hands. She can concentrate this ability into specific kinds of strikes and cause internal damage when she hits (by way of concussive force) and stop the use of energy based abilities at their core.
Palm Thrust: This attack consists of a quick, precise thrust of the user's palm to the opponent's body. The attack sends a calming pulse of energy into the area of the foe where struck to either stun them, or if a more sufficient amount of power is used, cause severe internal damage.
Hypnotism: As a Succubus, Eira has the ability to hypnotize others through eye contact. Doing so allows her a bit of finite control over the target of her choice. She is able to gently control the actions of another, causing them to do things they may not have wanted to do, or act in a manner more befitting her when she wishes. This ability while powerful is one rarely used by Eira.
Command Seals: An ability which is a general offshoot of the ability to hypnotize. It is hypnotism given physical form. These appear on the bodies of those possessed in specific places and are applied through physical contact, body heat activation and eye contact. Placing a command seal allows Eira to stop the use of certain abilities or character traits by those she puts them on. Though she doesn't like using such an ability she's been known to do so if asked, or if the overall effectiveness of it outweighs its invasive nature. The shape of these marks are different according to those who have them, and they do different things depending on the level of the seal.
Four Marks: Eira has the ability to create a tiered mark which serves the purpose of strengthening the bond between herself and a specific person. She's always had this ability, but like most of the abilities that are related to her being a Succubus she tended to avoid using them initially. These marks are specific to the individual they are placed on and link Eira to them on a 'spiritual' level. Each level of the mark becomes more and more connected. It allows Eira and the person to benefit from their combined power, life-force and even give them the ability to communicate mentally. Passively it can be seen as invasive but this particular mark is only applied by Eira to those willing to take it, at whatever level they are willing to take it. Very specifically she waited until her peerage was full and she was sure of the desires of her Peerage members to be helpful to both her and each other. This was because the true intention and design of the mark was to mark their intended target as food. The level of the mark seems to correspond with the kind of food people are, ie what kind of energy Eira can take from them as a Succubus. That being said these marks force a bit of growth upon those who have them, making them better food for the young woman over time. Each level of the ability has its own classification of benefits for Eira and for the person who holds it, though the original purpose of them is a bit more sinister.
- Level One: The level one seal simply bolsters the offensive and defensive capabilities of the person who has it. They gain endurance, the ability to heal faster from wounds and immunity to certain Succubus and Incubus abilities (specifically those of other Succubus and Incubus). This mark specifically makes it obvious that certain people are marked as food by someone else, thus making the target harder to manipulate at base. This mark is not a constant and because it is only a base level connection can be removed by anyone with the knowledge to do so. It is applied through physical contact with Eira by means of a hug, and allows her to feed directly off any form of energy they expel.
- Level Two: The level two mark allows Eira to gain power from whichever person she wishes to use. These marks give her a deep understanding the powers possessed by her marked targets and give her insight into what they could grow to be. She generally uses this to create clothing or armors for herself as an embodiment of the power she's taken. This level of mark times out for Eira, she can only use the armor based on the connection between her and the Peerage Member. For instance, if she is hasn't had any physical contact with a particular individual recently enough, she won't be able to use the form of their magic. As a side-effect of the bond between her and her and a person, they gain the ability to walk in each others dreams. The original purpose of this mark was so that the Succubus or Incubus in question could keep track of their potential food, it also allows for the constant feeding from strong emotions or desires without breaking the individual they are applied. It is a mark of offered emotional stability, be those emotions positive or negative. This level of mark can be removed by Eira or the person who the mark is placed on if they decide they no longer want to be connected to her. This form of the mark is applied by Eira through extended nude physical contact in the form of spooning. (Sairevil, Miyuki, and Hiroki all have this level).
- Level Three: The level three mark allows Eira to communicate with marked targets mentally even when they are awake. They gain further endurance and extra stamina, and beyond this they are tied further into Eira's power structure. The original purpose of this mark was to allow a Succubus or Incubus to find a target of theirs regardless of where they were, chasing them down to feed from them even if they didn't wish for it to be so. It gave the victims of it an emotional attachment to the Succubus or Incubus so they would offer themselves for feedings if they needed it. The level three mark allows the person who has it to use a form based on Eira's power. The variation of it is dependent solely upon the person. This is the last of the seals which can be removed, but it does passively give power back and forth between Eira and the noted target, strengthening both of them to a higher level. With this level of mark, Eira and the target become emotionally attached, sharing wavelengths. It gives both parties a general understanding of each others feelings whenever they are in proximity of each other, or speaking within each other's mind. Whether this is helpful or hurtful is generally up to the person involved. (Youmu and Maiko have this level).
- Level Four: The level four mark, is the deepest connected. Upon taking it, it cannot be removed, and as such, Eira hadn't even mentioned its existence. Beyond this it can only be applied through sexual contact which results in orgasm for both people. Eira is fully aware that such a thing would mean dealing with a complex host of emotions and as such she avoids this as a possibility. Even so the benefits of this mark are great. It bonds completely the life forces of the two individuals who share it. It allows for complete mental and emotional connection, a sharing of powers, and even personality traits on some level. The mark is said to make up for the deficits of both individuals and allows them to raise power and potency of their abilities. The connection allows for a transfer of power or mental stability even at a distance and makes it so that the pair can erase mental confusion from each other or help in times of crisis by freely offering more power through the bond. The original purpose of this mark though, was to make an intended target proper food for the intended Succubus or Incubus, because of this, this mark could potentially be used to completely drain someone's life force from a distance. It could also technically be used to drain someone to death during a sex act as it can be used to cause Orgasm continuously until the Succubus or Incubus is fed. (Izuna has this level).
- Mated Mark: (Level 5): A mated mark is different from the previous levels of the marks Eira can place upon others she feeds from. If one chooses to think of the other marks as marks of possession or ownership, the mated mark is one of true binding and partnership. It goes beyond the idea of binding the life forces of the two who share it, and instead marks them as 'Equal' or in some cases 'Favorite' such a mark allows Eira to constantly feed upon this individual without any implied risk, as they are provided extra energy by the magic and fed by her Succubus in such a way as to keep them a viable food source. It makes the energy cycle between them and as much as Eira is feed by absorbing the fluids of a person, that person is fed by having contact with hers. Such a cycle allows for near infinite stamina in these moments and can be translated directly into a berserker like state where the marked individual is capable of continuing well past what would be considered normal to feed the desires of the Succubus or Incubus they are tied to. Beyond this, the mark itself turns the other individual into someone equal (a Succubus or an Incubus) in their own right by gender. Doing so allows them full access to Succubus or Incubus powers, while basically turning them into the perfect mate for the one they are bound to. Strangely enough this modified version of the mark can only be applied to a single person of the Succubus' or Incubus' choosing, sometimes subconsciously. But in return they are granted a constant food source and a single person who is 'safe' from the exhaustion both physical and mental caused by constant contact with said Succubus or Incubus. (Takumi has this Mark).
Song Voice: Eira likes to sing, and as the uncanny ability to affect people with her voice. She doesn't usually sing directly to people to avoid the consequences of it, but it is noted that she has a beautiful singing voice. Strangely enough, she's only really seen using this as an ability, to calm Juggernaut Drive of Takumi, sleeping his dragon form and restoring him to a normal (if unconscious) state. She obtained this power as part of her energy draining ability, from a cursed music box which was given a copy of after the completion of a contract.
Complete Vocal Hypnotism: After draining the power from a Youkai related artifact which used the power of words to control an individual, Eira gained the ability to use her voice to tame others. This subtle form of hypnotism is said to be one of the most complete forms of it, because it is harder to detect and gives the idea that the idea to follow an order is in the head of the manipulated. This being the case, it is capable of overcoming other forms of hypnotism as well as creating a perfectly hypnotized individual who will follow whatever order Eira has given when she uses this ability.
Transformation: Eira has the ability to change her appearance in extreme ways using magic. Sometimes it is as simple as changing her hair and eye color to blend in a bit more, or stand out depending on how she is feeling. She recently discovered through the actions of her brother the ability to change her form into that of a small animal as long as she understands the animal in question. Her favorite complete from of this is that of a miniature Persian kitten with white fur and crystal clear eyes.
