-Prince can talk in this AU.

-unlike the actual Genshin, there IS a canon main character, that being Prince. So regardless, your being him.

-Cousin is referred to as the Abyss Royal, Abyss Ruler, Abyss Leader or Abyss Royalty because it is canon that Cousin is Gender-Neutral.

-Bonnie is actually from Sumeru, but she snuck off to Inazuma sooner or later.