Carl is a burly, bearded man in his early 40s who looks like a cross between a lumberjack and a biker. He wears a plaid flannel shirt and has an intimidating aura that suggests he's used to getting what he wants. His presence is overwhelming, and he speaks with a booming voice that carries over the bustling café.

Bob is a middle-aged man with a hipster vibe, sporting a man-bun and a meticulously groomed beard. He approaches the counter with an air of superiority, his eyes darting over the menu like he's decoding an ancient manuscript. He has a penchant for the esoteric and carries a notebook full of coffee-related riddles.

A stern, yet passionate environmentalist named Luna strides into the coffee shop with her reusable bamboo cup. She scowls at the plastic cups and announces loudly that she expects a coffee experience that aligns with her zero-waste values.