Sliver and Hooker are in a band together (Hooker is the singer/guitarist). Their band name is “Never Nude”, a reference to Arrested Development (one of my favourite shows, lol).
Sonnie is short for “Sonya”, Sliver’s fake name. Hooker doesn’t know of Sliver’s fighter past.
Hooker is bipolar. He writes most of the band’s music during his manic phases.
Aaaand… Introducing Nihilist Greg! He’s not really that important.