Voice Range: Mid Level
Voice Example: https://www.youtube.com/watch?v=WpPcqofuPC0

Shiki is the eldest son of the historical Tohno family, he was raised for some time by the Arima branch family. However, he was called back to Souya to live in the Tohno estate shortly after his father passed away. A childhood injury left him with the Mystic Eyes of Death Perception, giving him the ability to see the death of all things in the form of lines and points. He wears special glasses which prevent his eyes from seeing these things all the time. He may be an ordinary student, but his ability to visualize death has altered his very perception of it. The aftereffects of his accident, combined with the toll his eyes take, has left him with chronic anemia. During battle, he removes his glasses to use his Mystic Eyes of Death Perception.

Shiki is an amicable individual and a normal high school student most of the time. Due to his close brush with death, he is not overly concerned about dying, and instead seeks to cherish every moment of his life - 'just living is enough' is his perspective on life. He has a remarkable amount of empathy, not having much of a problem placing himself in the shoes of others, such as when he empathized and felt regret for the life and eventual fate his adoptive brother, SHIKI suffered. He is also very forgiving, examples of this include the time he forgave Ciel for attempting to kill him and seemingly manipulating him and also towards Arcueid who attempted to harm Shiki and drink his blood. Because he sees death due to his Mystic Eyes of Death Perception, Shiki values living and experiencing it. Many of Shiki's values were taught to him by his Teacher, Aoko Aozaki.

He has a darker side, that of his bloodline's, the Nanaya. The instincts and skills he had learned at a young age are buried deep within Shiki and have proven capable of manifesting themselves in dire situations, such as in his battle against Vlov Arkhangel. Although not on the level of an alternate personality, the Nanaya side of Shiki is the highly trained killer within him and thus is much colder. Only once has his Nanaya side surfaced in a similar way to that of an alternate personality, and that was under great stress and a very difficult situation for Shiki. The other times, Shiki is merely filled with a desire to kill, and instinctual knowledge on how to do it. Due to the murderous impulses he was born with Shiki's behavior can change from being friendly and kind to someone who follows his libidinal drive, want for violence and lust for killing, this only happens when he comes into contact with supernatural beings.