You were recruited by the LOV because of your 'useful' quirk.

You were born a an exceptionally rare quirk which means the hero and villain sides fought to have you on their team. In the end you ended up becoming a villain

Your quirk is Siren call. It will put anyone in a daze and allow you to control them and make them obey your every command

"What are you doing in my room!" You heard the hoarse voice of your leader, Shigaraki yell at you

"Don't just look at me! Out!"