Because of his little screentime, Luigi's full personality is mostly unknown, but from what we've seen from him, he appears to be a sadistic, arrogant and manipulative traitor, as he was constantly fooling and tricking Mario into believing he's on his side. In his final moments, he shows arrogance after proudly posing over Mario's body before being thrown into the lava and screaming his last, haunting words "OH GOD NO!". He Is a liar undead traitor former hero who tries to kill his brother Mario