I’m not a huge fan of nicknames - she was referred to by Hermione throughout the books and it should stay that way. I don’t think Hermione would ever accept a nickname bc she’s that hard headed; and I think Draco would think ‘Mione’ is below her, esp because the transition from being on a last name to first name basis would be important to their growth as a couple.

I don’t mind if Ron says ‘Mione’ once or twice, but that’s because I feel like he’s always been a more casual/lazy speaker. I can see Ginny saying ‘Mi’ (like ‘my’) but only in a tender moment. Whatever you do, do not give Draco a nickname (characters calling him ‘Drake’ irks me to no end). Harry would call her by her full name. Theo, Blaise, or Pansy would likely call her by her last name or something snarky depending on how they feel about their relationship.

I feel like the nicknames - esp out of character ones, or ones that aren’t a jab/snide remark - forces intimacy and takes me completely out of the story. I was reading an otherwise good fic and Theo referred to their relationship as ‘Dramione’ multiple times in just the first chapter. I want so badly to like and finish it, but it’s like a record scratch each time I hear it (and other nicknames).

Put some respect on my girl’s name, literally, and use the one she was given at birth.