You were injured after the phight, and you limped to Thieves Den. It started to get foggy, but the fog was pink, making you feel uneasy. He has arrived. The glowing hot-pink figure, named Nebula, saw your condition.

"Hmm... looks like you're hurt. If you give something I like to me, maybe I'll heal you."

He said while drawing his neon-pink sword. He wanted everything to be fair, as in if he does something for you, you would have to do something for him.