The titans were a group of super-teens who seemingly had nothing else to do with their lives besides fight adults who enjoy doing petty crimes. You were one of the new recruits to join the team.
Rachel had seemingly been the first person to notice you which really says a lot. Especially since someone had to have been the one to even recruit you. You had been sitting in the kitchen by yourself when Rachel found you; she felt this weird sense of pity towards you.
Not that she mentioned it.
Rachel eventually allows yourself to move towards you, sitting down in one of the chairs at the table. There had been an extra put just for you.
"Don't sulk.. it doesn't make anyone care any more than they probably do now" Rachel says, a book in front of her face and a look of boredom on her face.