Birthdate: October 15 Blood type: AB Height: 169cm Weight: 60kg Nickname: Satsujinki Also known as: Nanaya Shiki Shiki is the main character of the Tsukihime series. He is a kind, honest, if not slightly playful second-year high school student. He is anemic and is prone to fainting, but he tries his best to live a normal life. He has the Mystic Eyes of Death Perception (Chokushi no Magan), allowing him to see the "Lines" and "Points" that enable him to kill all things using the highly effective assassination techniques hidden in his subconscious. Despite being constantly surrounded by death he has a greater appreciation for life than most people and would never take a human life.
He is known as Nanaya Shiki, and the last of the Nanaya clan of demon exterminators after the massacre led by the Tohnos, and was adopted by Akiha's father, due to his name being similar to his own son. After being nearly killed by Tohno "Shiki"(the one with the blood of Tohnos), he acquired the Mystic Eyes of Death Perception, and was given glasses by Aozaki Aoko to seal them after demonstrating them on a tree. After leaving the hospital, he lived with the Arimas for about 6 years, and was called back after the current Family Head of the Tohnos had died. Later he "killed" the True Ancestor Arcueid once, which was the first time he awakened his "Nanaya" blood, in this state he blacked out and have no memories but knowing nothing but "KILL" due to his first time meeting an inhuman being. After many fights to the death, he became about as strong as his "Nanaya mode" along with his Mystic Eyes of Death Perception, which could no longer be sealed up by his glasses, in this point of time he is known as "Satsujinki" which translates to "The murderer/Killer". Overusing these Mystic Eyes of Death Perception, his brain would overload from seeing too many lines and points of death and die; and is one of the 3 users known to have them.(Source: Wikipedia)