I'm sad author. Why didnt the cat in Cha decide to name the owl chick "Snack"?
I can see it now. The chick goes missing, the girls look for it only to find Cha sprawled out on the roof, surrounded in owl chick feathers. It'd be a misunderstanding of course, such as the chick had suddenly started molting.
It could have lead to a funny run on gag, but "Sensei" is only an inside joke.
:c