Xiao and Heizou both hold your hands, their grips being tight, not seeming to let go.

Xiao: He's mine.

Xiao growls at Heizou as he tries to pull Aether closer to him, Heizou hisses and does the same and pulls Aether to him.

Heizou: He's MINE.

They continue to fight over Aether, they loved him with all their heart and would do anything to keep him to their selves but they can't do that with having the other trying to keep Aether away.