Mari Phelps is Lucien Cramp's best friend at school. She often co-operates with Lucien on his environment-conserving efforts, but often can't help desiring a bit of power.
Mari has ginger hair and wears rectangle-shaped glasses. She also wears a lime green shirt and purple jeans
Mari is a foster child and is looked after by a happiness-obsessed, brown-haired family with strange customs. She is the black sheep of her foster family and is often embarrassed by their habits.In the episode Rotten Romance, Lucien briefly had a crush on Mari when she felt sorry for him during a time he felt certain he would never have a girlfriend, but nothing came of it. However, they remained good friends.
- She has been aported
- She is the only child in her family to have ginger hair