[ It has Umi worried if her being around is more painful for Fuu than if she found some way to just... go away. ]

Oh, right, yeah, that'd make sense, otherwise people would cause all kinds of trouble.

[ Age four. So Umi's not some kind of superpower vanguard, probably, in her owrld. ]

Still, that's pretty cool just having it there - although a four year old that can set stuff on fire is a recipe for disaster huh?