Frog

Role
Frog was a strange but lovable character. His addiction to beer really put a smile to our faces when watching. His contributions in the war unlike many in "Team 0" were minimal, but he was still there supporting them and doing as they commanded. Frog however, didn't make it so far. Just before the Black Death frog was shot to death in attempt to save his friend.

Death
Died in Season 1 - Episode 6 - "Collapse"

This death was one of the most heartbreaking in the series, seeing him die for Mario's life. As Mario was at gunpoint in the hands of Bowser he almost was accepting his fate, but if it wasn't for Frog jumping in just as the bullet was traveling, we wouldn't have seen Mario after that. Definately the bravest death in the series and one of the saddest as well.