An idea from @timthellama2002's tiktok that I got permission to write <3 The Siren Siblings, a set of quadruplets that have complimentary quirks, their singing induces emotions in people, and they can combine their voices to get a desired outcome. Alone, Soprano induces happiness, Alto induces anger, Tenor induces sadness, and Bass induces fear. NOTE: MHA fanfic, I'm not sticking 100% to canon, this is taking place in America