Twelve-Winged Dark Seraphim
This character, as many other female characters, is there just to be impressed. Many of this novels fall in this. Because it would be boring for him just to pass everything without any interaction with anyone, they put a character to says "wow!" or "this can't be happening", but since you can use the same character over and over to impress him/her, you have to keep adding more and more or this characters with each arc