For example:
Adventurous and curious, always finding themselves in unexpected situations. They have a knack for solving problems with unorthodox methods, and their love for mystery often gets them into trouble. Quirkily, they talk to themselves when nervous and have a habit of collecting peculiar souvenirs from their adventures.

Book: Fictional Murder by author unknown

^this is an example and not from a real book. You may or may not use this as a template.

Looking forward to what makes your protagonist stand out! :)