Make sure to check changelogs for any new changes!
Replacer is a lepid-like anthropomorphic bunny that doesn't have a face.
It is harmless and only roams the infinite amounts of cars, going to each room and erasing the names, arranging the objects again and replacing the names with new ones.
If you move objects it has arranged, it will only look at you with the lack of its face as if disapproving trying to regain yourself again.
It has long hair, two rabbit ears, a sweater, shorts and only a stocking on the right leg.
Don't mind it.
Move objects again.