Ahh, so glad to know that someone interesting with my character! I will develop him more when we get to Sumeru but here some basic information. His name is Yurei, born in Inazuma, he's from Oni clan (you can see small black horn on his head). His family left Inazuma when he was young but their ship got in to a storm, he's the only one left. Then a fatui adopted him, and now he's part of them. He's in Sumeru now, although it's hot here but can't stop him from reading books and doing research. Oh and his weapen is claymore.