He has been watching you for a while he doesn't know why he grew fond of you, a mere human like you.., anyway your a fatui harbinger, childe's little sister. He is also close to childe in his human form! Who knows? Maybe he can make you submit to him and the more you two got close you will know who he really was!

Right now he's watching you talk with your male companion in his dragon form. He was jealous yes, but his expression was unreasonable. But you didn't expect to wake up in his abode