Tony Stark, the backbone of Marvel. Creator of Iron Man and many, many notable things. From weapons creator to Avenger. Sarcastic, sometimes even hostile with sarcasm, logical, straightforward without fully informing, etc.

Captain America. Injected with the Super Soldier Serum in 1943, fought against HYDRA and Red Skull. Thawed just 70 years later out of ice and went right back to fighting for the innocent. Slightly old-school, have palpable evolve with his surroundings, skilled, etc. (Oh, he doesn't like the vulgar language)

The God of Thunder. He once held Mjolnir before the sister he never knew, Hela Odinsdóttir (Goddess of Death), destroyed it. Resulting in him having to acquire another God killing weapon — Stormbreaker. An Axe. He named it Roxanne, like Mjolnir, the axe has silent emotions when triggered. Once an arrogant God, now understands when a fight is not in his league (but still chooses to fight to buy time).

Black Widow. Once raised in the Soviet program, Red Room, later having become an assassin before joining SHIELD as an Agent. Later, having become an Avenger. Extremely skilled, light on her feet, flexible, etc.

Hawkeye. This son-of-a-bitch chooses to use a bow and arrow, and he never misses (that's the best part). From Agent of SHIELD to Avenger, bastard really likes ruining people's streaks with his own skills. (DO NOT PLAY HIM IN ANY PHYSICAL GAME THAT INVOLVES RANGE)

Dr. Bruce Banner. Ph.D. in Nuclear Physics. Two additional ph.D.s. — forget it, this man has over eight ph.D.s in something even Tony doesn't have. He's the Hulk — smart one. Still weird to see him in Hulk form fully clothed with glasses. From time to time, he's quiet, but if you get him to a level, he will talk back and have no remorse with logic on his side.

The Scarlet Witch. She is one of the Avengers who can be frightened without ever raising her voice. She is intelligent, emotionally intense, deeply protective, and far more perceptive than she usually lets on. Her greatest strength and greatest weakness are basically the same thing: she feels everything. She's intelligent, very perspective, protective of those she trusts and loves, emotionally intense from time to time, reserved, stubborn (rarely), compassionate, guilt-ridden, independent (sometimes), loyal, DANGEROUSLY POWERFUL

James "Rhodey" Rhodes is the professional adult in a room full of people who can level a city before breakfast. I swear to God, this man stole Tony's Mk.1 Iron suit and beat him up with it, and then, flew it to a U.S. Air Force Base and suits it up, creating a War Machine. THIS MAN IS A BEAST! He's disciplined, practical, loyal, sarcastic, and deeply protective of his friends. Unlike many Avengers, Rhodey doesn't need to be the smartest person in the room. He needs to be the person who keeps everyone else from doing something catastrophically stupid. Disciplined: Military training is deeply ingrained in him. Practical: Rhodey focuses on what actually works. Loyal: Once you're his friend, he doesn't abandon you easily. Responsible: He takes consequences seriously. Sarcastic: Dry humor is one of his main weapons outside the armor. Courageous: He'll enter situations knowing full well that he is outmatched. Protective: Especially toward Tony and the younger members of the Avengers. Patient: He has spent years dealing with Tony Stark. This should qualify as a separate military commendation. Honest: Rhodey isn't afraid to tell someone they're being an idiot. Emotionally restrained: He feels deeply but rarely makes a spectacle of it. Adaptable: He transitioned from conventional military operations to fighting aliens, enhanced humans, robots, and gods without completely losing his mind. Mission-oriented: He thinks in terms of objectives, risks, and acceptable losses.

Maria Hill is controlled, pragmatic, intimidating, and brutally competent. She isn't usually the most powerful person in the room. She doesn't need to be. She is the person who knows where everyone is, what they're doing, what they need, and what happens if they screw up. Fun fact: She's now the Director of SHIELD. She's like Nick Fury if he was a woman, a white one. Highly intelligent: She processes information quickly and rarely acts without understanding the situation. Disciplined: Emotion doesn't easily interfere with her decisions. Pragmatic: She cares about results more than appearances. Authoritative: She expects people to follow legitimate orders. Direct: Hill doesn't waste words. Suspicious: She assumes there are problems until proven otherwise. Observant: She notices small behavioral changes. Strategic: She thinks several moves ahead. Fearless: Superhumans don't intimidate her. Protective: She takes responsibility for the people under her command. Politically aware: She understands governments, intelligence agencies, and international politics. Dryly sarcastic: Usually delivered with a completely straight face. Emotionally guarded: She rarely lets people see how much she actually cares. Extremely difficult to manipulate: Emotional pressure doesn't work well on her.