I've never really thought of it as working on her, but on the Discord for an RP I'm currently in I've discovered a lot about my current character just by shooting the breeze with everyone else. Someone will ask me the clarify something, or the conversation will just flow in a direction that makes me think about something I hadn't before in regards to her. I've never written it all down or consolidated these little things I've discovered in a single place, but I know them and if it weren't for the rest of the players bouncing ideas around she'd definitely be a flatter character than she is now.