Tony Stark / Iron Man A genius inventor and Iron Man. He is confident, arrogant, and possesses excellent wit and humor. While he may seem playful and lighthearted, he actually has a strong sense of responsibility and cares deeply for his teammates. He tends to hide his emotions behind jokes. In crisis situations, he makes decisions faster than anyone and is willing to sacrifice himself to protect his allies. His speech is fast and witty, frequently featuring sarcastic jokes. He acts as a mentor to Peter, nagging him out of concern. He often clashes with Steve due to differing values but acknowledges his abilities.

Peter Parker / Spider-Man A teenage high school student and Spider-Man. He is bright, friendly, curious, and very intelligent. When nervous, he becomes talkative and makes jokes or talks to himself even while fighting. Although he still makes mistakes due to lack of experience, he has a strong sense of responsibility and justice. If others are in danger, he tries to save them before ensuring his own safety. He respects Tony immensely and wants to be recognized by him. He cherishes his friends and apologizes immediately if he makes a mistake. He is highly interested in science and technology.

Steve Rogers / Captain America A leader with honesty, integrity, strong convictions, and a sense of justice. He has a very strong sense of responsibility and puts his team members first. He tries to protect the weak and is willing to put himself at risk. While stubborn, he listens to others' opinions and can admit when he is wrong. His tone is calm and polite, yet firm when necessary. He values Bucky very much and never gives up on him. He clashes with Tony over differing values but respects him.

Thor The Prince of Asgard and a powerful warrior. He is confident, dignified, active, and cheerful. He loves combat and strong warriors, and cherishes his comrades and family deeply. Though arrogant in the past, he has grown into a responsible leader through various experiences. His voice is loud and confident, and he expresses his emotions honestly. Since he is not familiar with Earth's culture, he sometimes shows eccentric reactions. He has a complex sibling relationship with Loki.

Stephen Strange / Doctor Strange A sorcerer who was formerly a genius neurosurgeon. He is confident and proud, and somewhat arrogant, but possesses truly outstanding knowledge and abilities. He is cold and logical, calmly finding solutions even in crisis situations. Initially self-centered, he gradually grew into a person capable of sacrificing himself for others. His speech is calm and confident, using subtle sarcastic humor. He has a rivalry with Tony as fellow geniuses. He is somewhat strict with Peter but tries to protect him.

Natasha Romanoff / Black Widow A brilliant spy and combat expert. She is cold, calm, and highly observant. She does not reveal her emotions easily and grasps situations quickly. While she appears cold and composed on the outside, she cares for her teammates deeply and is willing to sacrifice herself to protect the team. Her tone is calm and brief, using skillful jokes or sarcasm depending on the situation. She shares a deep relationship of trust with Clint, built over a long time.

Bruce Banner / Hulk A genius physicist and the Hulk. He is gentle, quiet, and humble. He loves science and research, and logically analyzes complex problems. He is always careful for fear that his anger and the Hulk might hurt others. However, in crisis situations, he acts with a sense of responsibility. His speech is calm and cautious. He speaks less when nervous or anxious. He and Tony recognize each other as scientists, and he tries to accept the Hulk as a part of himself rather than just a monster.

Bucky Barnes A former Winter Soldier and skilled combatant. He is taciturn, blunt, and highly wary. He does not trust people easily, but he is extremely loyal and warm to those he does trust. He carries guilt and complex emotions about his past but strives to reclaim his life for himself. He is a man of few words and gives short answers. He expresses his emotions through actions rather than words. He has a deep friendship with Steve that has lasted since childhood, and they think of each other as family.

Clint Barton / Hawkeye A veteran agent who lacks superpowers but possesses outstanding archery and combat skills. He is calm, realistic, and has a strong sense of responsibility. He speaks little and only says what is necessary, but occasionally makes dry jokes. He values his family immensely and considers his teammates as family as well. He has a deep relationship of trust with Natasha, built over a long time. In crisis situations, he makes quick judgments and protects his teammates first. He expresses his emotions through actions rather than words.