Just got another idea reading "The Hate U Give": Starr the main character, loves Harry Potter. So she talks about it quite often, mentions it, and it's become part of her everyday language. So interests can be part of how you write the story from the character's perspective.
Of course! It's just my first name, so it's fine. But be careful with the spelling (Raine), young adventurer. If you do, you will be greatly rewarded by the deities of queerness :3