Can You Beat Three Houses Maddening Mode With Only Byleth?

Fire Emblem: Three Houses is a strategy game that is best played with the full number of available characters, especially if the difficulty is raised. But where’s the fun in playing a game as is? In Mekkah’s 40,000-subscriber special he tries to finish the game using only the game’s main character in battles. Can he do it when the difficulty is raised to maddening? I’m sure I can’t. That mode is too difficult for me!