Ewen

Ewen was a person who did nothing, apart from guffaw at the Toa Yerta once and blow up a Snowman. He was later killed by Parasitic Fluff, but somehow came back, and found himself on Tatooine, where he became known as the Dead Mind, and controlled many tentacles which would randomly rise out of the sand and attack people.

However, these indiscriminate attacks did not satisfy Ewen. He wanted revenge on Kakamu, who he felt had left him to die. He got his chance when TPK teleported Kakamu to Tatooine. Ewen used tentacles to try and drag him underground, and when this failed he used a sonic attack to knock him out and then drag him underground. He then ranted about his motivations, and fought Kakamu until Ewen eventually knocked himself out with his own KILL sword. A weird black cloud then came out of Ewen's ears, and disappeared. Ewen then woke up, saw Kakamu, and tried to punch him.

Trivia

 * There is a rumor that Ewen was in fact a small, large-headed alien in control of a mecha.