I thought of some methods but in this setup of the game, there is no way to take him into the game. Because I gave the bad team the kill rank. They don't know each other but they know their number. Everyone knows that how many they are. Now when I bring Bom into the game if he's bad the ranking should change and the bad team will know it right away. This knowledge needs to be shared with others as they will understand. Either way, it will be immediately obvious which team Bom is on, which will automatically make him the "most trusted player and natural leader of the council" before he dies. This situation is completely against the natural structure of the game. Because this means that the team that the player is in will almost certainly win the game, no matter which team he is in, the result will be clear before the game starts.
Sorry Bom, there is no way to do this.