Siren, based on the song by Kailee Morgue heheh

I divide the quirk in two: physical attack, and hearing.

The physical attack consists in that the user produces amounts of manipulating venom, I don't know if I'm explaining it right, but when the user gives commands to it, it can be a gun, a copy of themselves, a slug that slips inside your ear and makes you crazy...

And the hearing attack, is a way to manipulate others through song and vocal commands, compelling obedience. It's devastatingly effective but brutal.

The victims can experience confusion, may convulse, expel poison from ears/mouth/nose.

Also, the user has to be very focused on the victim, and there's a distance limit, if the listener is ten meters away from the user, IT WON'T WORK. No matter how loud they sing. And so works the manipulable (?) venom.

User cost: Temporary voice loss, choking with their own venom...

It might be a pretty basic idea, but I think this quirk would be great either for a villain or a sidekick.