Luigi

Role
Luigi is one of the biggest characters in the first series, but doesn't seem to be as big in Season 2. Luigi started off as the stupid and funny character but ended up becoming a fearless veteran by the end of the series. Like a few other characters he spent his early days in the war joining "Team 0" which was the main Bowser fighting team. And unlike few others in that team, Luigi was able to live to the final battle.