Sakura

Both Chihiro Fujisaki and Sakura Ogami keep parts of themselves stowed away in mental boxes labelled as "secret" and "shameful". Neither realises how similar they are until they have a meaningful talk a little before curfew.

Alternatively, Sakura keeps her femininity under tight wraps whilst Chihiro uses it as a shield. After a short talk, they come to understand each other slightly better.