Shiki Ryougi

Shiki Ryougi is one of the main protagonists of Kara no Kyoukai. She is a girl who possesses the Mystic Eyes of Death Perception, a supernatural ability that allows the user to see the inherent mortality of everything (both living and non-living) in the form of lines. In her case, however, what she sees is the Origin of what she is observing. She assists the Garan no Do agency in handling paranormal cases when combat is required.

Background
Shiki's family, the Ryougi, are or were members of the Demon Hunter Organization. Their special skill involves creating two separate and distinct personalities within themselves. When a child is born, he or she is given a single name written in two different Kanji, each one relating to each personality. Shiki has an older brother, however he was unable to manifest a second personality within himself, thus making him ineligible to succeed as the head of the family. Like her brother, Shiki's mother and father are unnamed, but are seen in the movies. (Shiki's father in the second movie during a sword fight; her mother in the fourth movie after she comes out of her coma; her brother is seen in the seventh movie in a flashback.)

Personalities
Prior to her coma, she originally proved to possess two personalities, a male personality named SHIKI, and her usual female personality Shiki. Children born into the Ryougi family are generally male and are raised with two personalities, so the male personality is customarily called the "yang" personality, while the female is called the "yin" personality. However, Shiki's unnamed brother was not born with these dual personalities and thus deemed unsuitable to be the family heir, resulting in Shiki being raised as the family head in his place. It is easy to tell which Shiki is speaking at a given time because they both have a distinct style of speaking, most notably that the female Shiki speaks politely and with reserve, referring to herself with the gender-neutral pronoun watashi, while the male persona has a brash personality and refers to herself with the masculine pronoun ore.

After waking from her coma, Shiki discovers that she can no longer feel the male Shiki's presence and assumes that he died because of the accident. She also feels a detachment from her memories before the accident, and while she knows she is Shiki, she does not feel that she is. In the hopes of regaining herself and the "dead" Shiki, she puts on a cold facade that somewhat resembles the male Shiki's and tries to act as the female Shiki did. Touko understands the sense of detachment Shiki feels, but considers the current Shiki a third, new personality.

As it turns out, Shiki possesses a third personality other than the one Touko perceived (which is in fact Shiki's usual female personality) who always existed in the gap between the male and female Shiki and hid her existence from both. As Shiki puts it, the third personality is Akasha, "the origin of all things" itself[1] and the original personality housed in the body (rather than Shiki (female) and Shiki (male) which are personalities housed in the mind). Usually, a life begins connected to the Origin until the connection is severed at birth, and even if somehow a life remained unsevered, the body's personality itself should not become self-aware, but the Ryougi family's special trait allowed it to survive and survive with intelligence. Because she has no interest in anything however, she usually remains dormant within Shiki.