Sir Helios is a former Knight of the Sun who appears in the episode "Fear No Mort".
Biography[]
Sir Helios is seen at a restaurant asteroid with another Knight of the Sun as he offers his sword to Morty for giving them their dropped sandwich and politely declining to take it for himself. Morty tries to decline but is pressed by the knights and other aliens to take Sir Helios’ sword. Sir Helios dubs him Sir Mortaniel and commits suicide with the sword as Morty is transported to the sun.