@UXLZ I believed her ability is "Can create anything she can think of", which is pretty OP. But everyone in this series have pretty OP ability as well, eg. mind-control, reality-bending-buff, perfect-auto-dodge. full-heal, unstoppable-arrow, etc. I think it's cool how this doesn't turn into Bleach already.
It's more than just a pocket. She can either wormhole stuff to it or copy it, otherwise the store guy wouldn't hate her so much. He said something like 'you just looking is shoplifting.'
Amelie's ability I see as sort of like a Kaio-Ken type powerup that's dependent on her own belief and willpower. It's not unlimited, and the more she draws out the worse the backlash will be.
@UXLZ She has the ability to reproduce everything she has seen before from her pocket. That's why the store guy says that, since she essentially owns the things she's seen. Imagine trying to sell a product but your customer can copy your product just by seeing it. It's not Apportion, since that would make her a thief.
@mister_nobody Clara's power would be more like a Forgery ability. She can replicate the things she sees and even adds little details like replicating a dress for Iruma, but it has the right proportions to suit his body. It is some scary stuff if used well.