The Box Prince Impostor is the main antagonist of the episode, "Box Prince (episode)." His role was taking away the thrown of the Box Kingdom from his brother, The Box Prince (character). Finn tried to help the original prince take back the the kingdom, which resulted in the two princes dueling. After they collided during the duel, it was revealed that they have the exact same appearance.
The Box Prince Impostor looks exactly like the Box Prince (character). It is unknown if they are related or not.
- Because he was of absolute power, he could have been considered a King.
- The reason for the conflict between him and the Box Prince is unknown.