Tsukihime

The protagonist of Tsukihime. He is actually not a Tohno, having been adopted on a whim by the Tohno family after they slaughtered his demon-slaying family of assassins, the Nanaya clan . Eight years ago, he was involved in a severe accident that he barely recovered from, resulting in his banishment from the Tohno family and the loss of his Nanaya identity (he is made to believe he's Shiki Tohno) . On waking up in the hospital, he finds that everything is covered in 'lines,' and will fall apart if he traces along the lines. He finds that he has the 'Mystic Eyes of Death Perception,' which allow him to perceive the nature of death itself.

Perceiving death will lead to great insanity, however, but on a chance encounter with a mysterious stranger he is given a pair of glasses which will block his ability, so that he can live normally as long as he has them on.

Generally the quiet type, he seems rather passive on what happens around him. Because of the accident and his ability, his constitution is very weak (regardless of his fitness), so his very life tends to be to the verge of death. Ironically, he who is the greatest killer and the closest to death places a great value on life, as he can tell how precious it is. He has made peace with the fact that, due to both the accident and his ability, his lifespan is greatly reduced to the point where it would not be strange for him to die at any moment.

The last remaining True Ancestor vampire (which are the original, perfect vampires born of the world itself). She meets the protagonist after a rather... brutal incident, but teams up with him afterwards. Despite being over 800 years old, she has only been awake for less time than the protagonist has been alive.

Un-adapted to human society, she tends to behave very childish. She tends to get into arguments with any women who are close to the protagonist (due far more to her rather selfish personality than any jealously). Obscenely powerful, very few beings can even hope to stand up to her if she gets serious. Over 70% of her power is used to suppress her vampiric impulses, however, making her nigh unstoppable if she were to lose control.

Seat #7 of the Church's Burial Agency, a hidden organization within the Church devoted to the elimination of heretics - namely, non-human threats (especially vampires). Due to a paradox created by her existence, she is cursed so that she cannot age or die (excluding the protagonist's ability). The world itself will fully return her to her original form no matter what kind of damage occurs or how little of her is left in order to fix the paradox that would be created by her death .

She wields the Black Keys, sword-like giant nails which are highly effective against vampires (True Ancestors the notable exception), and the Seventh Holy Scripture, one of the most powerful weapons the Church possesses which can even bypass reincarnation.

She is rather possessive of the protagonist, and often at odds to the point of outright conflict with women close to the protagonist (due to her profession as well as her jealously). Has an obsession/addiction to curry of any kind. Her battle costume is actually the result of her cosplay hobby, not a uniform.

The protagonist's sister, although in truth they are actually not remotely related . The new head of the Tohno family; in the beginning of Tsukihime she invites the protagonist back to the Tohno Mansion after the death of her father, who kicked him out after the accident.

There is far more to her than meets the eye, as she is actually a demon hybrid; long ago the Tohno family mixed their blood with non-humans in order to gain power. Her demonic trait shows in her true hair color (a deep pure red called Crimson Red Vermillion) and her ability to steal heat from things (named 'Origami'), an ability far more powerful and frightening than it sounds.

Her personality initially seeming to be prim, proper and noble, in reality she has a large temper on a short fuse. Despite how she talks to him, the protagonist is her most important person, to the point where she gave half of her life force to the protagonist after the accident (at great strain to herself), so that he may survive.

One of the two maids in the Tohno Mansion, she is the younger twin sister. The protagonist's personal attendant, her duties involve waking him up and cleaning the house. Along with her sister, she has been in the Tohno Mansion since childhood. She comes from a family of Synchronizers, but it is unclear how the Tohno family obtained her and her sister.

Initially seems slightly cold, as she shows little emotion, but she is actually very kind (she has a large crush on the protagonist). She used to be very carefree, but upon finding out what was done to her sister she became so depressed that her sister agreed to 'take on her role' until Hisui was happy again, which then backfired, as Hisui remains emotionless so that her sister will always continue to smile . Does not cook, due to her highly 'unusual' sense of taste. Possibly the protagonist's greatest in-home ally, as she secretly covers for him when he sneaks out of the house at night. Two words: highly loyal.

One of the two maids in the Tohno Mansion, she is the older twin sister. Akiha's personal attendant, her duties involve serving Akiha and cooking. One of the more tragic characters. Although she has been at the Tohno Mansion as long as her sister, she was never allowed to leave the family head's side, only being able to watch everybody playing from a window. As she is from a family of synchronizers, she was used by the Tohno Head to stabilize his human side (basically raping her for her powers to take effect) , resulting in general childhood trama and a the incurring of an enormous grudge. Highly intelligent, she already has a degree in medicine(through illegal manipulation of her official age).

She seems highly optimistic, and always smiles. This, however, is due to her agreement with her sister to 'take on her role' until her sister is happy again, which will not happen as her sister's guilt will not allow her to do anything that will stop Kohaku from smiling . Kohaku seemed to have a crush on the protagonist, as when he was kicked out she posed as her sister in order to give him a white ribbon, making him agree to someday return and give it back. She is a genius and master strategist, capable of predicting and manipulating any scenario to fit her needs. Has a small garden where she grows some highly suspicious plants.