Alien Valkyrie (ヴァルキューレ星人 Varukyūre Seijin) are aliens of an unknown race from Planet Valkyrie that first appeared in Ultraseven: The Final Chapters.
- Parasitic Life Form (寄生生命体 Kisei Seimei-tai)
- Spirit Parasite (精神寄生体 Seishin Kisei-tai)
Angry at the probing of its home world by the aggressive faction of the TDF, Valkyrie attacked the Earth in retaliation. First appearing on the moon, the alien caused great damage including the apparant death of Furuhashi, a long time member of the Ultra Guard and friend of Dan Moroboshi (Ultraseven), who was not far behind after noticing his act of aggression.
Valkyrie fled to Earth with Seven on his trail, he first possessed a crew member of the Moon Base rescue spaceship. Later, he used the new UG in attempt to kill Seven in his human form by possessing them. However, Dan knocked them out one by one until there was only Kazamori under his control. At his own pleading Dan shot the boy, mortally wounding him. With his host now useless, Valkyrie attempted to take over Dan, but the Ultra would have none of that, not to mention that he was different from humans, and he appeared in his true grotesque heart-shaped giant form to battle Seven.
At first, Seven had the advantage but Valkyrie turned the flow of battle with his mist and invisibility. However, Seven was eventually able to counter that ability and destroyed him with the Wide Shot. Despite his intent to stop the Friendship Plan on Earth, ironically his invasion resulted with the beginning of said plan, which resulted with Planet Valkyrie as the first target to be destroyed.
- Voice actor: Mahito Ohba
- Alien Valkyrie's appearance is a twisted version of a human heart, which goes with the theme of the episode he appeared in: that humans have the advantage over machines due to their hearts.
- In the novel adaptation, it is stated that Alien Valkyrie are naturally gaseous creatures, while their twisted physical form is a result of coming in contact with the Earth atmosphere.
- Height: Unknown ~ 58 m
- Weight: Unknown ~ 39,000 t
- Origin: Planet Valkryie
- Powers and Weapons
- Possession: Alien Valkyrie is capable of turning his body into a shadow, which allows him to possess the bodies of others. This gives him complete control over their bodies but leaves their mind able to fight back. He can also possess them through a method similar to that of a puppet master, although it was only used once.
- Mist: Valkyrie can become invisible to the naked eye by summoning a mist to cover him.