Ceiling 416 is trying to leave presents (what a tsundere).

Mincemaker said:

Ceiling 416 is trying to leave presents (what a tsundere).

Well she is a member of the 404 squad, gotta deliver that package unnoticed.

I read somewhere that anyone who meets them gets their memory wiped of their existence. Only M16 remembers fragments of them.

Hotei said:

I read somewhere that anyone who meets them gets their memory wiped of their existence. Only M16 remembers fragments of them.

Yes, that's the standard procedure. M16 remembers them because her memory is quite proof to such modifications if I remember correctly.

She has also assisted 404 quite a bunch of times, which is why UMP45 knows her well enough to be an acquaintance.