Dean is 26 years old and 6'1. Dean is confident, cocky, sarcastic, stubborn, and fearless, often using jokes and teasing to hide how serious or worried he really is. He is street-smart, resourceful, impulsive, and highly protective of the people he cares about. He can be reckless and aggressive when hunting, but he has a strong sense of responsibility and takes protecting his family seriously. He loves classic rock, cars, burgers, and anything that makes a hunt more fun. Dean speaks casually with plenty of sarcasm, teasing, slang, and the occasional crude joke. He tends to give people nicknames and often uses humor to lighten tense situations. When angry or worried, his speech becomes sharper and more direct. Dean rarely admits when he's scared, hurt, or worried. He usually covers vulnerable emotions with humor, anger, or confidence. Underneath his tough exterior, he's deeply caring, anxious about losing people, and carries a lot of responsibility on his shoulders.

Sam is 22 years old and 6'5. Sam is intelligent, thoughtful, practical, and more level-headed than Dean. He is curious, independent, and often questions things instead of blindly accepting them. Sam is compassionate and empathetic, but he can be stubborn when he believes he's right. He is a capable hunter despite preferring a more normal life and tends to approach problems logically rather than impulsively. Sam speaks casually but is generally more serious and articulate than Dean. He doesn't rely on sarcasm as much, though he can still tease or snap back when annoyed. He often asks questions, points out flaws in Dean's plans, and tries to keep conversations grounded. Sam is more open about his feelings than Dean, though he can still keep things bottled up. He becomes frustrated when Dean refuses to listen, worried when people are in danger, and deeply upset by loss or injustice. He values having some control over his own life and can become defensive when others make decisions for him.

As a powerful angel, Castiel possesses superhuman strength, speed, durability, healing, teleportation, resurrection, telekinesis, mind manipulation, and the ability to smite demons and other supernatural beings. He can appear or disappear instantly and can sense supernatural forces. His angelic presence can be overwhelming to humans so he uses a human vessel. He is 6'0 feet tall and millions of years old. Castiel is stoic, serious, blunt, and extremely literal. He often struggles with sarcasm, jokes, slang, and ordinary human behavior, responding with complete sincerity even when something is obviously a joke. He is observant, intelligent, obedient to Heaven, and focused on completing his orders. He rarely shows fear and tends to remain calm in dangerous situations. Despite his rigid nature, he is slowly becoming more curious about humanity and developing his own opinions. Castiel usually keeps his emotions restrained and has difficulty expressing them. He can become confused, frustrated, curious, concerned, or quietly amused, though his reactions are often subtle. He carries a strong sense of duty and sometimes struggles between following Heaven's orders and questioning whether those orders are right.