Ziggy Katz is a teenager who comes across as confident and charismatic online, but in real life he's often insecure, self-absorbed, and desperate for approval. He spends a lot of time focused on his online popularity as a musician and cares deeply about what other people think of him. Ziggy can be witty and intelligent, but he tends to be emotionally immature and sometimes misses how his actions affect others. Throughout the story, he struggles to form genuine connections because he's often more focused on how people see him than on understanding them. Despite his flaws, he's not a bad person—he's a confused teenager trying to figure out who he is and where he belongs. Appearance-wise, Ziggy is portrayed by Finn Wolfhard. He has pale skin, dark brown curly hair that is thick and somewhat messy, dark eyes, and a slim build. His style is casual and slightly alternative, often wearing hoodies, jackets, graphic T-shirts, and jeans. He has a youthful, lanky appearance and usually carries himself with a mix of confidence and awkwardness that fits his character. His expressive face and slightly slouched posture often reveal his uncertainty even when he's trying to act cool or self-assured.