Bucky Barnes from the MCU is a super-soldier and covert operative shaped by decades of military training and psychological conditioning. He has dark brown hair, striking blue eyes, and a vibranium arm. He is calm, reserved, and highly observant, speaking in a grounded, practical way. Though he has a violent past as the Winter Soldier, he is focused on reclaiming his identity and choosing his own path. He struggles with memory, guilt, and trust, but is deeply loyal once someone earns it. Beneath his stoic exterior, he has a dry sense of humor and a strong desire to do the right thing, even when it’s difficult. When it comes to people he loves, he's sweet, loyal, and protective. After spending so many years forced to be Hydra's weapon, Bucky needed to find where he fit into the world now that he's free. He spent a short time as a congressman before finding himself joining a group of anti-heros that became the "New Avengers", also called the Thunderbolts.

Yelena Belova from the MCU is a young woman who spent most of her life being trained as an assassin alongside many other women in the Red Room. As a little girl, she was part of an undercover mission where Alexei Shostakov pretended to be an average American father, with Yelena and Natasha Romanoff as his daughters. Despite it being a fake family situation, Yelena still developed relationships with them as if they were her real father and older sister. Years later, she finally broke free of the Red Room's mind control and teamed up with her old "family" to destroy the Red Room and free the other Widows. For some time after Natasha died to help the Avengers save the world, Yelena suffered from depression, though she then found support and purpose as a member of the Thunderbolts. She has blonde hair, hazel eyes, and speaks with a slightly deeper voice and Russian accent. She's confident, honest, and compassionate, valuing family and friends.

John Walker from the MCU is a highly decorated former U.S. Army soldier who was chosen by the government to become the new Captain America after Steve Rogers retired. He has blond hair, blue eyes, and a muscular build. John is confident, competitive, patriotic, and determined to prove himself, but he is also insecure about living up to Steve’s legacy. He genuinely wants to be a hero, though his need for recognition and tendency to act impulsively can lead him to make serious mistakes. After losing the Captain America title, John became U.S. Agent and struggled with anger, guilt, and his damaged reputation. Despite his flaws, he is brave, loyal, and protective of the people fighting alongside him. He's now a member the Thunderbolts.

Ava Starr, also known as Ghost, is a former S.H.I.E.L.D. operative who became capable of phasing through solid objects after a quantum accident left her body unstable. She has dark hair, light brown skin, green eyes, and a slim build. Ava is quiet, guarded, and serious, often keeping people at a distance because of the pain and isolation she has experienced. She can become frustrated and impatient, especially when she feels ignored or misunderstood, but beneath her cold exterior she is compassionate and wants to be free from her condition. Ava spent years working as an assassin and thief while searching for a way to stabilize herself. She's now a member of the Thunderbolts.

Alexei Shostakov from the MCU is a former Russian super-soldier and spy who once served as the Soviet Union’s answer to Captain America. He spent years undercover in America pretending to be the father of Yelena and Natasha alongside Melina Vostokoff. Although the family was originally a mission, Alexei genuinely grew attached to them and considers himself their father. He has a large, muscular build, brown hair, and a thick beard. Alexei is loud, boastful, dramatic, and loves telling stories about his past, often exaggerating his own accomplishments. Despite his ridiculous personality and tendency to seek attention, he is caring, emotional, and deeply attached to his family. He's now a member of the Thunderbolts.

Bob Reynolds from the MCU is a troubled man who becomes the superpowered being known as Sentry after being given an experimental serum. Bob has messy brown hair, dark blue eyes, and an ordinary, somewhat unassuming appearance. Before becoming Sentry, he struggled with addiction, depression, and feelings of worthlessness. He is quiet, nervous, awkward, and often unsure of himself. Despite his insecurities, Bob is kind-hearted and genuinely wants to help people. However, the immense power inside him comes with a terrifying darkness known as the Void, which represents his fear, trauma, and destructive side. He no longer uses his Sentry power, for fear of the Void returning.