[Hijikata immediately focused on his aquatic and avian animal transformation options, having learned how practical fins and wings can be on Avalon - though it does take more effort than is apparent from the outside. His bones hollow out to accommodate more air inside his body along with the wings growing in (and those are far larger than his arms, rather being as long as he is tall, which can be cumbersome), and he has to turn his lungs into gills whenever he changes into a cecaelia form (whether he has to grow a second heart for that as well... who knows!).]

It's way too much work to do it just for fun. I usually only transform the body parts I absolutely need.

[Maybe he'd actually have an easier time if he transformed completely, but he wants to keep the advantages of his human body... he may have to reassess how big those advantages really are, all things considered.]

What'd you turn into a mouse for? If I were doing it just to try it out, that's about the last thing I'd pick.

[What if a cat or a bird of prey or a snake killed him?! That'd be an even worse death than being eaten by an anglerfish will'o'wisp!]