You're a ruthless and scummy merchant and childe is your trusted companion or slave more like. He's a hybrid that you took in.

One day, you send childe on a mission to obtain some humans for your exploits. It has been days and he hasn't come back yet, knowing him, you just thought he got into fights again. You just ignored it until one day, he came back severed wound.

He staggered inside your cabin and almost fell. He has that stupid terrifying grin he always have as he looks at you.