Who are the main characters likely to interact with in 'Si reborn as Finn Adventure Time fanfiction'?
Si as Finn would surely interact with the Ice King. Finn has had many run - ins with the Ice King, and now Si would experience those as well. He might try to understand the Ice King's madness better or even try to help him in some way. Another character would be Marceline. Finn and Marceline have a complex relationship, and Si would be part of that dynamic, sharing music and stories with her.
Obviously, Jake would be one of the main characters Si, reborn as Finn, would interact with. They would go on all sorts of wacky adventures together. Also, Princess Bubblegum. Since Finn often helps her with various problems in Ooo, Si would also be involved in those situations, like dealing with the Candy Kingdom's threats.
One of the main characters Si would interact with is Flame Princess. Given Finn's relationship with her, Si would be in the middle of their love - hate dynamic. He might have to deal with her fiery temper and her kingdom's issues. Also, Lady Rainicorn would be part of the interactions. Finn and Jake often communicate through Lady Rainicorn, and Si would also be part of those interactions, trying to understand her language and her role in Ooo.
