Characters need quirks. What makes yours unique?
It doesn’t have to be something big. Not every book needs a ninja/librarian that loves chocolate ice cream and orange kittens. It came be something simple. Which character in popular literature wears round glasses? Which female protagonist survives with her mad bow and arrow skills? Which cartoon characters have a pet platypus?
It doesn’t have to be elaborate, but give your characters something that makes them unique. Give them a trait or a love or a dislike that will stick in the readers mind. This will make the character more real and memorable.
Important note: don’t go too far with the trait. If your character always does the Hokey Pokey when they hear the word red, it might get a little annoying. For a character whose uniqueness makes them obnoxious, watch Episode 1 of Star Wars. Jar-Jar Binks is unique, but . . . .
What are your character’s quirks?