Kana Shiraishi is one of the White Knights, and second-in-command to Miyu Shiratori along with Rin Shiragiku. Kana is a very pretty girl with light brown hair tied in a set of twintails by two hair ties fashioning a purple motif. She wears the white dress that all the White Knights do, although she is seen in flashbacks wearing a classic school swimsuit and swimming cap, as well as her old black uniform. Her attire is complete with a pair of mid-calf white socks and standard black shoes with a medium heel. Like most of the girls, she wears a pair of white panties under her dress, with the distinghising feature than hers fashion a little pink ribbon above the crotch, a feature only seen in hers and Miyu's. Kana's breasts are fairly large for her age, though they are among the smallest in the White Knights, together with Misumi's and Misaki's, and always look especially small in comparison to Rin's huge ones, since they are both always standing close to each other. From the picture drama it appears Kana and Rin may have somewhat of a romantic relationship but it is still a bit ambiguous. She is around 5' 3".

In Aika Zero Picture Drama 2, Kana's panties are shown with more detail, and are white with vertical lace designs framing her groin, and a little pink ribbon in the front below the waistband. The reality of their situation still hasn't sunk in as both girls smile and launch another tendrils attack seeming positive they had the situation under control. Aika then effortlessly blocks the tendrils with her bare hands. Rin, who seems to be much more intuitive then Kana, starts to realize the two girls have bitten off much more than they could chew. Kana, on the other hand, just looks frustrated demonstrating she had not realized how outmatched they were. Aika then fires at Kana and Rin with her gun. The two girls, now fully in the defense, form a shield with the tendrils. but are startled when their shield does not reform after being dented by Aika's bullets. Kana, still not fully aware of her situation remarks "