Gan Q is an inter-dimensional creature that appears as an antagonist in the Ultraman franchise, first appearing in Ultraman Gaia.
Gan Q first appears in episode 6 where it tormented Gaia's host Gama Takayama with strange visions. It later absorbed Gaia into it but was killed when Gaia burst out, destroying it from the inside.
It later reappeared in episode 31 as the reincarnation of the evil sorcerer Kijuro Mato. It was destroyed by Ultraman Gaia's Photon Stream.
Ultra Galaxy Mega Monster Battle
Gan Q appeared in episodes 5 and 6 as Kate's second monster, sent out to fight Rei's Gomora after it overpowered Kate's first monster, Fire Golza. It was destroyed by a shot from the Pendragon's Hyper Omega Cannon Gan Q.
Mega Monster Battle: Ultra Galaxy Legends The Movie
Gan Q appears as a member of the Belial Army. He participated in the final battle where he was killed by Ultraseven's Eye Slugger attack.