I'm making this chapter for character appearances, but I've also described the characters somewhere in the novel for those who skip Auxiliary chapter.
MC, Christopher Maxwell. Blond hair, electric blue eyes. (Picture in comment section and chapter comments) ->
Nymphadora Tonks. She has two appearances. One cute, One beautiful. There are... circumstances that are not canonical, so the the original appearance is different. You'll find out once you read it. (Picture in the chapter comments)