What is shiina?

Some articles on shiina:

List Of Nogizaka Haruka No Himitsu Episodes - Nogizaka Haruka No Himitsu
... bumped into twice turns out to be Shiina Amamiya, the new transfer student into his class ... The school swimming tournament is coming the following week, but while Shiina can do a variety of other skills, swimming is not one of her strong points, so Yūto and Haruka help her prepare in the ... At the tournament, Shiina gets a leg cramp during the race and Yūto jumps in to save her, and he takes her to the infirmary ...