u/dustyp9

The most creative thing I could come up with is that hides amongst trees luring in lost travelers with convincing, familiar sounds from one siren cone. Simultaneously, the other siren cone would be emitting low frequencies that induce panic and sickness in humans, kinda like an LRAD. When a victim gets close enough, it'll start blaring unsettling and incomprehensible shepard's tone, which induces even more panic while also rising volume to lethal decibels until the victim's insides are pulverized by sound.

If it eats humans, I imagine it would just pick up bodies with their hands and just shove the whole thing down it's siren cones. No teeth, no chewing, no tearing the body up into bite-sized chunks, just smashing and ramming the whole body down its "gullet," like trying to shove one more garbage bag into an overflowing trash can.

If it's feeling extra malicious, it might broadcast the sounds of its feeding out of the unoccupied siren cone.

No scary or tragic backstory to speak of; I'm not smart nor creative enough for that. Sometimes, you just need a fucked up little guy with no explanation why he's there. Siren Head is such a unique and interesting character design that it deserves equally unique and interesting ways to kill. That is, if they're aggressive and predatory.

TL;DR: Hypothetically speaking, how do you guys imagine Siren Head would kill its prey?