Terra is generally an evil character. He serves Ra Moon, and tries to keep EMP wave number two of Crappy Town going. Too bad Foxy had to end it.
Curse of Ra Moon (First appearance)
The Stardroids come to Crappy Town (Last appearance)
Foxy (main rival)
Everybody else in the series he met
Terra is the most known one time character in TARS, see comments to find out why.