Richard is Survivor in Episode 3: The Scientist that appears on East Street 7. He survived the attack at the unnamed camp earlier in the episode. He later stays behind with the Hero, Red, and several unseen survivors at the camp in hopes or rebuilding it.
Who are you? I'm Richard
Oh... well, thank you, but I'm going to stay behind and re-build the camp. I know it's dangerous and stupid, but it's my home. I'll check out the safe house, though.