Heavy despite his lack of intelligence, he is 14 years old, Heavy makes up for it with kindness and overall outgoing personality. His older sister, Dee, is someone Heavy looks up to. Dee helps other students cheat on their exams in exchange for money and by defending her younger sister, Heavy, from Chipmunk. This shows us how she uses her intellect to earn money and benefit herself, and helps establish her role as a caring (even if we don't admit it) older sister, dee's age is 15 years old