Headcanons of your own characters

Just like little things about your characters that either aren't exactly canon or moments that won't pop up in your story.
Can be anything, really.

• One time, when Lili's staying at the Burrow, Fred brings home vodka to try and get her drunk. He pretends it's just flavoured water. It works.
• In fifth year, Fred sneaks weed into Hogwarts. He gets Lili to smoke it without saying what it is. She ends up running through the halls all night and hanging from the Whomping Willow. Was not what Fred intended.

Lili always knew that she would have a set of twins because both she and George are twins themselves. She didn't expect to have two sets, especially one after the other.

Lili unintentionally flinches in arguments if the person she's arguing with steps towards her or moves in a certain way. She's done it lots of times in fights with Cedric and George. It's been ingrained in her cause of her father.