南 いすか

Born into a well-to-do family, she is forced to enrol into St. Estella after her parents lose themselves in a cult. Her mindset on religion and belief is mollified after she meets the priest of St. Estella who treats her well and instils a more orthodox religious belief into her. Isuka is extremely shy and has trouble conversing with members of the opposite sex.

 Because Isuka's parents were incompletely incapable of distinguishing between genuine cases for assistance and scoundrels looking to defraud the family, Isuka developed a talent for ascertaining the true emotions of strangers which she visualises as a spectrum of colours corresponding with different states. As a result of her talent, she avoids social contact because she can instantly detect someone approaching her under false pretences as well as males attempting lewd advances against her. After she meets Shirase sometime before meeting Yukito, the supernatural power she gains allows her to broadly visualise the thoughts of others when she makes physical contact with them. Depending on route, her power can strengthen and become more effective allowing her to "see" what others are thinking; when she starts losing control she acts as a medium amplifying knowledge-sharing and sensory stimulation with others within a limited radius. 

In her route ending she loses her sight but is still capable of household chores thanks to a prodigious spatial memory. Her witch-granted powers of perception also stabilise after she leaves the Academy.
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