One exclusive crush, it can be against her own will, her body talks for her at some point
Virgin, untainted, innocent, inexperienced, immature (and so on)
Unsecure, or/and very clumsy (always flustered by both critics and praises)
Mostly heerful, at least when hero-sama's here
Get saved. Even if she's the one true god of this land and the hero is some fly.
Like paternalist/animalistic pats
Sometimes play the sisterly act
Cries, get emotive ; can get jealous, clingy, or sometime just let everything pass and consider other romantic interest sisterly (because they'll be girl ofc).