There could be a new character, like a young apprentice that Tony discovers during his journey of self - improvement. This apprentice could be someone who Tony decides to mentor in the future, but first he has to fully raise himself to be in a position to do so. The apprentice could also be a source of new ideas for Tony as they interact in some unexpected ways.
In this fanfiction, Tony might be stranded on an unknown planet or in a different dimension. He has to use his wits and the little knowledge he has to not only survive but also better himself. He might start with basic survival skills like finding food and shelter, and then move on to more advanced self - improvement, such as enhancing his physical and mental abilities through self - training and self - experimentation.
A love interest could also be involved. If Tony had a girlfriend or boyfriend before the injury, they might have to decide whether they can handle the new situation. Their relationship could be strained at first, but then they could work through it and become even closer. Or it could be a new person that Tony meets during his recovery, like a kind nurse, and a new romance could develop from there.
There could be a friend of Tony, like Steve. Steve might not understand Tony's dislike and keep trying to hand him things out of kindness, which could create some interesting interactions in the fanfiction.
There could be a local Siberian healer who becomes an important figure in Tony's life, helping him with his pregnancy.
It could be his friends or colleagues. For instance, Pepper Potts might be there. She could be the one who helps Tony deal with the consequences of revealing the truth, or she might be one of the first to hear the truth from him. Another character could be Rhodey. He and Tony have a close relationship, and he would likely be involved in whatever situation Tony is in, especially when it comes to something as big as revealing a truth.
Probably the other Avengers like Captain America. He could play a role in trying to save Tony or in the fight against Thanos that ultimately leads to Tony's death. Maybe Doctor Strange as well. Since he has knowledge of the future and the Infinity Stones, he might be involved in some way. He could either try to prevent Tony's death or his actions could inadvertently lead to it.
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.
Obviously, Tony is one of the main characters. There might also be characters like Steve, who could be Tony's friend or rival in the fanfiction. Natasha could be another important character, adding her own skills and personality to the mix. And then there's Bruce, the scientist, who could play a crucial role in the stories.
The main characters are Tony and Michelle. They are likely to be the focus of the fan - created stories. Tony is usually portrayed as a strong and intelligent character, while Michelle also has her own set of skills and a unique personality.
There could be a best friend character. This person might be heartbroken when Tony leaves. They might have shared a lot of secrets and experiences together, and Tony's departure would leave a big void in their life.