Feel free to add on, but give some thought into these questions. If you don’t know the answers, make them up! It’s a good exercise and can really help your characters breathe.
1. What about your character is heroic? 2. What about your character is social? What does your character like about people? 3. Of what benefit could your character be to a group? 4. Why would your character choose to join a group? 5. Invent an adventure/plot that your character would actively undertake (as opposed to just tagging along)?