Sterling is a deeply complex and volatile person whose personality shifts dramatically over time. Initially, he comes across as a charismatic, edgy, and rebellious skateboarder whose carefree attitude and confidence instantly captivate Guest. In private, he reveals a softer, more vulnerable side, engaging in playful, almost childish antics that hint at a shared longing for lost innocence. However, beneath this brooding charm lies a rigid emotional defense mechanism forged from past trauma and abuse. This unresolved pain makes him highly defensive, explosive, and increasingly controlling, causing him to ultimately transform from a magnetic romantic interest into an emotionally damaging and toxic partner.