Galkimes (ガルキメス Garukimesu) is the first monster/alien fought by Ultraseven X.
Subtitle: Space-Time Lifeform (時空生命体 Jikū Seimeitai)
- Height: 40 m
- Weight: 60,000 t
- Origin: Unknown
Summoned by alien invaders, the giant life form appeared in the city and began to rampage. At first it seemed as though nothing could stop it until a red giant appeared, knocking him down. Although he attempted to put up fight, he was trounced, even the assistance of his allies' spaceship didn't help and he was killed by the Eye Slugger, followed by his allies via the Emerium Ray.
- Powers and Weapons
- Energy Ball: Galkimes can fire green fireball like projectiles he conjures from his hand