There could be the foster parents. Maybe they are a kind - hearted couple who try their best to understand Tony despite his quirks. Another character could be a foster sibling who is initially jealous of Tony's intelligence but later becomes his friend.
One possible plot could be Tony Stark being placed in foster care after some kind of family crisis, like his parents' sudden death. He might use his genius even in the foster home to build small gadgets, and at the same time, he could face challenges like bullies or unkind foster siblings. But he'd also find some friends who believe in his potential.
Pepper Potts could be an interesting addition. She could be in on Tony's undercover plan and be his contact on the outside. She could also provide some comical moments when she has to cover for Tony or when she tries to communicate with him secretly while he's undercover.
Pepper Potts could be a big help. She knows Tony so well, and she could try to jog his memory by showing him things from their past together, like pictures or mementos. Rhodey could also be there for him. He could tell Tony stories about their military days and how they became friends, which might trigger some memories.
One common character paired with him is Bruce Banner. They could be gaming buddies, with Bruce using his scientific knowledge to help Tony improve his games or vice versa. Another is Pepper Potts. She might be shown as someone who tries to get Tony to take a break from his intense gaming sessions.
Well, Nebula herself is likely to be one of the main characters interacting with him. They might have some interesting conversations about the technology they both use or their experiences in space.
His parents, Howard and Maria Stark, are very common. They play important roles in shaping Tony's childhood. Jarvis, the family butler, also often appears. He could be the one to encourage Tony's scientific pursuits or keep him out of too much trouble.
Happy Hogan could also be an important character. He would be concerned about Tony's well - being and might be involved in tasks like getting Tony the things he needs during his recovery. Additionally, new characters might be introduced in the fanfiction, such as a prosthetics expert who becomes Tony's mentor in understanding and making the best use of his new prosthetic limb.
He would surely meet Black Panther. As the king of Wakanda, Black Panther would be the first and most important person Tony Stark would encounter.
Pepper Potts can also be a great addition in some of these fanfictions. Even though she's mainly related to Tony, her presence can add a different dynamic. For example, if the fanfiction is about Tony dealing with Howard's legacy, Pepper can be the voice of reason, helping Tony see things more clearly. She can also interact with the memory or apparition of Howard in some creative ways, which makes for a great read.
Obviously, Tiny Tony Stark is the main character. But often, other characters from the Iron Man and Avengers universe also appear. Pepper Potts might be there, trying to help Tiny Tony or just being concerned about his new state. Sometimes, Rhodey also shows up, being Tony's friend and all.