Gender: Female.
Full name: Juleika Couffaine.
Nickname: Ju.
Age: 15-16.
Occupation: Student, Superheroine.
Likes: Scary things, Modeling, Playing guitar, Art, Affection with Rose, Rock, Makeup, Rose, Marinette and her politeness, Horror movies, Reunion with Rose.
Dislikes: Being ignored or excluded, Cats, Chloé being rude, Someone revealing her secrets, Her feelings of guilt.
Relatives: Anarka Couffaine (mother), Jagged Stone (father), Luka Couffaine (older twin brother).
Lover: Rose Lavillant.