Kana Altair is a student at the Death Weapon Meister Academy, specifically enrolled in the NOT Class, which is designed for students who are not yet on the front lines of battle. She is notably small and slight in stature, even shorter than some of her peers who are not considered tall. Her most distinctive feature is the small, elbow-length white cloak she wears, which has a hood with a pair of stitched animal ears on top. She keeps this hood drawn over her head almost constantly, even when indoors, though her face and light shoulder-length hair remain visible. The rest of her typical outfit consists of a dark top with vertical stripes.

In personality, Kana is a very quiet, soft-spoken individual who often prefers solitude to conversation with others. She is frequently preoccupied with her deck of tarot cards, which she uses for fortune-telling. When she does interact with fellow students, her face usually lacks any strong expression, and she can be blunt and seemingly inconsiderate, delivering her prophecies without softening their nature. For instance, her first encounter with a new student involved an immediate warning of a terrible calamity. Despite this, she treats people with respect if they are polite to her in return. However, she takes great pride in her predictive abilities and does not tolerate anyone questioning their accuracy. When challenged, she reveals a scornful side, firing off a rapid barrage of insults through her tarot cards, such as showing cards depicting The Fool or made-up ones like The Pig or The House, while refusing to acknowledge the person directly.

Kana's primary role within the story is as a fortune-teller. Her background reveals that she is a skilled practitioner of divination, an ability highly respected by other students because her predictions are frequently accurate. She is capable of foreseeing future events, such as warning a new student about an impending calamity that later came to pass. She also possesses a specific skill known as compatibility divination, which allows her to determine if two individuals, often a Meister and a Weapon, are well-suited to form a successful partnership.

Regarding key relationships, Kana is often seen in the girls' dormitory lounge and is a senior student who, despite her antisocial tendencies, is respected for her uncanny abilities. One of her significant interactions involves giving a fortune to a student named Jacqueline, where she confirmed that a relationship with her partner Kim would be successful, thus influencing their eventual pairing. She shares a living space with roommates, including Eternal Feather, who is seen looking after her.

Throughout the narrative, Kana undergoes a notable development when she falls under the influence of a blood poison mind-control ability. In this state, she attacks her peers, including Eternal Feather. Her last significant appearance in the story involves her being freed from this control and resting safely in Eternal Feathers arms, fast asleep.

Kana's notable abilities revolve entirely around her divination. Using her tarot cards, which consist mainly of the Major Arcana along with some of her own unique additions, she can accurately predict the course of an individuals future. This is not a vague party trick but a genuine power that her peers do not take lightly. Her expertise in this area is well-known, to the point where some of the newer students initially suspect she might be a witch.