Ok lemme see if i can make his mechanic like this

Lore Stuff: Y-130 Breaks Lockers for fun and no other reasons, Y-130's favorite song is "Hidden in the sand" which is why he sings or hums it all the time.

Hes singing hidden in sand

how is it harmless if it breaks lockers? like i know it doesnt kill you but what if a actually harmful entity comes right after it? wont that be a assist kill?