Yukari has weak legs theory

This is a theory I came up with few weeks ago, and I think it’s quite interesting. First evidence

In all of her appearances in Forbidden Scrollery she's seen mostly seating, either on couch, floor, or her own gap

Second evidence

In WAHH she's seen standing but doesn't walk. And in chapter 35 when Kasen pulls her out she's immediately finds a stump to sit on as they talk, when they could talk while standing. In FDS she also doesn't walk, and either just standing or sitting.

Third evidence I haven't played fighting games but from the players I heard that Yukari is slow, and in AoCF she doesn't even walk, and lazily floats on her gap