Kira Nakano

Kira is a demon hybrid and the long lost sibling of Itsuki. She is mostly known for her mastery over Solar Demon Slayer Magic because of the numerous demons she has killed. She is mostly known as a loner who travels around Earth Land in search for jobs. A couple of years of doing so she met her long lost twin shortly after the birth of the Hyakki Yagyō. When she met him she became Nurarihyon's Hand. After, this meeting she left and continued traveling around Earth Land as if nothing had happened. Unbeknownst to everyone, her previously lifestyle became a cover up for her new job as Nurarihyon's Hand. This required her to enact Itsuki's will in secret, performing nearly any task he may give her in total secret.

Appearance
Kira is a demon hybrid who is tall for her age. Her training with Helios has given a fairly athletic build, complete with toned muscles. Her leg muscles are especially toned. Kira usually has a relaxed and friendly body posture and she rarely makes herself look threatening. The only time she does is when she is around someone she cannot stand. Her facial expression usually makes her look relaxed. When she gets angry she becomes emotionless, like the calm before a storm. On the other hand, she scrunches her face up when she is annoyed. Itsuki once said that when Kira is annoyed she looks like a child who hasn't gotten what she wants.

Kira has dark purple eyes. When she is on a mission her eyes have a calculative look to them, noticing in everything around no matter how insignificant it may be. When she is on a mission her eyes reveal very little about her thoughts, making her unpredictable. This contrasts greatly to when she is not on a mission because like her facial expression, they have a relaxed look to them. Kira has long black hair that reaches a bit passed her waist. Her bangs frame her face and pointing inward with a couple of strands falling in-between.

Her attire consists of a large red and light pink coat that is buttoned up in the front and reaches past her knees. This coat has a white-colored diamond design on the sleeves starting from her shoulders and ending near her wrists. Underneath her coat she wears a red short-sleeved t-shirt and a black skirt that reaches to the middle of her thighs or short form-fitting pants.

Personality
Kira is a rather complex and difficult person to understand. She hates most of her biological family with a dying passion. When asked about her thoughts of her biological family she always says that if she had if her way she would make sure they died in the most painful way possible. The only person she likes is her twin brother, though the reason for this is unknown. Some say she feels this way because Itsuki was only a baby when she was abandoned and also because she doesn't feel it would be right for her to hate her twin brother.

Her continued hatred for her family is the result of two of her worst flaws. The first is that she has a habit of not letting go of the past. For her, any problems she has had will continue to be one until it is resolved, making it very hard for her to forgive those who have angered her. It makes it even harder because of how stubborn she is. While her principles can change, the decisions she makes will not. When she has decided on something she will rarely change her mind, even if it is the most logical thing to do.

On the outside, Kira is described as a proud and battle hardened individual who always tries her best at anything she does, physically, mentally, and otherwise. While proud, she is not overconfident. She treats her opponents with respect in order to have the chance of bettering herself at every opportunity, even when facing some drastically inferior to her. Additionally, she is shown to be very wise and intelligent. Often making very insightful remarks that most would overlook. This is bolstered by her reasoning skills, allowing her to learn a lot about an opponent by just looking at them while at the same time, making it hard for others to figure her out. These qualities, makes her a natural leader. It is easy for her to make people think she is the most important person in the room even when that isn't necessarily true. This makes those around her intuitively do as she says because of how much trust they have with her actions and decisions.

However, despite her great leadership skills Kira is usually described as a loner. This stems from her belief that it is best to stay away from huge conflicts and stick to the smaller one: hence her loner lifestyle. Despite this belief, there is a handful of times that Kira has decided to ally with a group or an individual or get involved in a large conflict. When she did so it was usually in her best interest to do so. This might suggest that Kira is wise enough to not let her principles blind her judgment.

Those who are lucky enough to get to her know her will realize that there is another side to her. Despite, being raised by a demon and her battle hardened exterior, Kira can be quite compassionate and charismatic. This was shown by how she has spared many opponents who were weaker than her. When she is with others she will never betray them and will often do all in her power to make sure they live, even at the cost of her life or worse. She is so loyal that if someone asks her and she agrees, she will make sure it is done even if the person dies before the task is finished.

This side of her is also the side that shows just how similar she is to her twin brother. When she chooses to fully show this side of her, Kira has reputation of acting kind of like a prankster. Her pranks aren't as well thought out as her brother, usually they are just enough to communicate to the other person that she is comfortable enough with them to consider them one of her few friends. An odd quirk she gets when she lets this side show is that it becomes hard for her focus. Some of the tiniest of things can break her concentration when she is like this.

Demon Kira
When Kira's demon side takes over her personality is said to change drastically. She is said to be very sadistic and manipulative, torturing her opponents both mentally and physically until they are on their knees and begging for her to kill them. When Kira is like this, she only has one goal: destruction. Everything else is worthless. However, she isn't a beast that is blinded by her desire to destroy. Instead, she is frighteningly tactical in the destruction she causes. One example is how she will whittle a person down until they are nothing, but an empty husk before inflicting physical pain. Another example is when she was deceitful and manipulative enough to cause an entire country to fight among themselves over the tiniest of things. When the fighting finally stopped there seemed to be nothing left, only a living hell.

History
When Kira was born on March 12th, her parents discovered that while her twin brother was healthy, she was extremely weak. Thinking that there was no hope for her, Raikardo and Shayera abandoned her in an undisclosed location. She was mere moments from death when an Etherious known as Helios found her. He took an interest in her immediately when he sensed the powerful demon blood that was running through her veins. The Etherious decided to save her by changing her magic origin with his Magical Barrier Particles. This changed how her magic power was circulating, causing Helios's Curse to enter her body for a brief moment in time. Within this brief moment, Kira was greatly strengthened and her body and magic power into that of Demon Slayer, allowing her to escape death.

Helios adopted Kira and became a fatherly figure to her. He taught her how to read, write, and use magic.

Equipment

 * Scythe: Kira's primary weapon is a red-colored scythe. This scythe was given to her by Helios when she finished her training as a Demon Slayer. This scythe is made mostly of magic power that has been modified by Magical Barrier Particles in the same way as the Magical Barrier Particles in her body. This makes the scythe especially lethal to demons just like Kira's Solar Demon Slayer Magic. The magic power in the weapon also makes the scythe very sharp and durable. It is able to cut through diamonds with ease and deflect powerful blasts from Crash as if it was nothing. Because of the magic power it is made of, Kira is able to transform the scythe into solar energy and store it in her body. This makes the scythe very easy to carry around and hide. All that is needed to manifest the scythe is a single thought.

Solar Demon Slayer Magic
Solar Demon Slayer Magic is Kira's signature magic. It is a form of Caster Magic, Lost Magic, and Demon Slayer Magic that gives her the traits of the sun demon: Helios. When she was a baby Helios modified her magic origin with Magical Barrier Particles. These Magical Barrier Particles now work alongside her magic power to perform various effects. One such ability is the ability to transform her body into form that mimics Helios's demon form, turning her body into a very dangerous weapon. It also gives her absolute immunity to all elements relating to the sun. Furthermore, she is able consume these elements to rejuvenate her body, mind, and magic power. In addition, this magic creates a connection between Helios. This gives Helios the ability to attempt to possess Kira. Normally it would become easier with every use of the magic and would drive the mage to insanity. However, the powerful demonic genes that runs through her body passively rejects nearly every attempt Helios makes. This makes the side-effects of this magic a lot less dangerous and problemsome. The main ability of this magic is the ability to produce all aspects of the sun of the underworld from her body. The solar elements she is able to produce is a lot more dangerous. This because of the Magical Barrier Particles within the element and also because any person who touches Kira's element instantly gets radiation poisoning, making it very easy to die from it if an opponent underestimates her or is not careful. She has absolute dominance over solar energy, giving her the ability to use it for a lot of different purposes. As a form of Demon Slayer Magic, Solar Demon Slayer Magic is especially dangerous to demons. The elements produced by this magic are more than capable of harming or even some of the most powerful of demons. Just like the sun, she can use solar energy for nondestructive effects like healing herself or an ally or enhancing her own or an allies physical or mental abilities. This, however, takes a lot out of her so she rarely does it. In addition to being able to produce and control sun-based elements, she can transform her body in things related to the sun. Her mastery over the sun is said to be so great that night never falls in the area she is, trapping the area around her in a state of eternal day until she leaves.
 * Sunny Day: Kira extends her hands toward the sky and increases the intensity and heat of the sun rays in the area around her for a brief moment. The sun ray's intensity and heat are increased so much that it blinds everyone in the general area while reducing everything to ashes. Kira has been shown to be able to use this on such a large scale that there seems to be nothing, but ashes for miles around.
 * Solar Transportation: Kira looks at a gathering of solar energy and channels her magic power throughout her body. This allows her to teleport to the location of the solar energy that she was focusing on.
 * Sun's Curse: This passively ability rather than a spell that causes anyone who touches her to be sun burned. The severity of the sun burn varies depending on the amount of force that was used to touch her. The severity of the sun burn increases every time the enemy touches her again. Since it isn't a spell, it doesn't require magic power, causing it to be constantly active.
 * Solar Recharge:
 * Solar Demon's Fury:
 * Solar Demon's Brilliant Fist:
 * Solar Demon's Twin Suns:
 * Solar Demon's Assault: Kira claps her hands together and causes a large stream of solar energy to burst up from the ground beneath the opponent, launching them into the air. The solar energy falls back to the ground to create a large pool of solar energy. Dozens of medium-sized bullets of solar energy are launched from the pool and at the opponent at high velocities. Each bullet is capable of hitting the opponent with incredible force while severely sun burning them. After all the bullets of solar energy have been launched, they gather above the opponent to form a large demonic looking creature that is made of solar energy. The creature launches itself at the opponent and brings them crashing to the ground with enough force to create large crater while sun burning the opponent even burn.
 * Solar Demon's Meteorite: This simple yet powerful spell allows Kira to a large meteorite of solar energy above the opponent. Once created, the meteorite comes crashing to the ground, resulting in a very large and fiery explosion that can reduce to ashes nearly anything in its path. Kira can also use this spell by gathering pre-existing solar energy above the opponent, allowing her to use less magic power.
 * Solar Demon's Landmine: Kira slams her hand against the ground flows her magic power into ground to create a large stigmata. When a target steps on the stigmata, the stigmata will releases a powerful surge of high-voltage lightning that can severely injure the foe as well as inflict terrible electrical burns.
 * Solar Demon's Marking: Upon physical contact, the user flows a bit of solar energy into the foes body. The solar energy will engrave an orange stigma onto the foe's skin. The stigma will constantly increase the opponent's body temperature at a very fast rate. So quickly in fact, the target might spontaneously combust after only five minutes. The only way to dispell the stigma is to overload it by channeling a large amount of magic power to it.
 * Solar Demon's Solar Storm: Kira extends one of her arms and releases a large and invisible cloud of electrons, ions, and atoms. Once released, the cloud spreads rapidly, negating any electric-based spell or ability in its path. This cloud is also able to throw a lightning mage's magic origin into disarray, preventing them from using any electric-based magic for extended periods of time.
 * Solar Demon's Thermal Detonator:
 * Solar Demon's Barrage: Using her incredible speed, Kira seemingly teleports to the opponent before kicking them high into the air as a stigma appears on the opponent's skin. Once the opponent is in the air, multiple spheres of solar energy are released from the stigma and begin to rotate around the opponent as they are suspended in the air. Kira teleports herself to one of the spheres and transforms her body into solar energy. Immediately afterwards, she launches herself from the sphere at blinding speeds and transforms back just in time to punch the target before turning back into solar energy and entering another sphere. This cycle repeats itself, causing the enemy to accumulate a lot of damage. Finally, after a minute Kira appears above the opponent and launches them to the ground with a solar energy-enhanced punch. This punch can severely injure the opponent and inflict a large third or fourth degree burn in the process.

Time Magic

 * Restart: Outside of battle this spell gives Kira the ability to absorb a person's "time" and convert it into a type of energy called time energy. Normally this time energy doesn't do anything. However, whenever Kira dies it seeps into her body and brings Kira back to life and to a healthier state by reversing the time of Kira's body. The one downside to this spell is that Kira can only hold enough time energy in her body to perform this spell five times.
 * Chrono Switch:

Demon Hybrid Physiology

 * Unnatural Physical Prowess:
 * Enhanced Senses:
 * Demon State: As a human-demon hybrid, Kira's demon and human side are always fighting for control. When her demon side manages to take control it causes Kira to transform into what is known as her demon state. In this state, her personality changes completely and her spells become a lot more powerful while her physical abilities will increase greatly.
 * Augmented Physical Prowess:
 * Nigh Invulnerability: In this state, Kira becomes highly resistant to most things. Only Curses and magic focused on killing demons can harm her. This allows her to brush off other attacks as if it was nothing. Even fatigue seems to not affect her as she seems to be able to fight for very long periods of time. This nigh invulnerability comes from the fact that her demon half forces her human half to absorb all of the damage. When her human half finally takes control again, the damage that it had to absorb will usually leave Kira in a vulnerable state.
 * Cursed Magic Power:
 * Fear Manipulation:
 * Negative Emotion Empowerment: Like demons, Kira in this state is able to feed on the negative emotions of those around in order to strengthen herself.

Quotes

 * "Normally I hate allying myself to others because it usually comes with big problems. However, there is no harm in having a preference in terms of clients." - Kira becoming Nurarihyon's Hand

Trivia

 * Kira's personality was partially inspired by the Star Wars canon Legends character: Mara Jade Skywalker.