Oh god! I actually misread the "Girl in a Box" tag as the title of a certain song..

Oh no! The treasure chest turned out to be a Kisume!

Monster(?) in a box!

Damn Mimics, always killing me when I'm low on health. I need more Moe Defence!

This treasure is definitely worth keeping.

Treasure Chest Ranka?

I'd certainly be 'defeated'

Me, I'm just hearing the "get treasure" fanfare from Legend of Zelda.

I'm grabbing this and outta the dungeon.

I can actually understand this in a sense that in certain games mimics are actually inhabitants of chests. Kisumes species would become mimics if they picked a treasure chest as their "home" in this sense