"On my planet, we have no families, but on Earth, after living as Mr. Kusano, he has taught me a lot of things. I will be considered as a traitor on my homeworld, and punishment awaits, but it doesn't matter as long as the Earth is safe."
- ―Alien Beryl's farewell words
The Alien Beryl (ベリル星人 Beriru Seijin) are an alien race that appeared in Ultraman Cosmos.
Subtitle: Infiltrate Alien (潜入宇宙人 Sen'nyū Uchūjin)
Two Alien Beryl tried to invade Earth with one possessing a policeman and another possessing Kusano Tadao, a family man. However, while living as Mr. Kusano on Earth along with his family, the alien had a change of heart. When Helzzking appeared and Musashi/Cosmos struggled against him, he rescued him, killed his companion, and told Musashi/Cosmos Helzzking's weakness. After the battle was over, he returned to his planet, separating from Mr. Kusano despite knowing the consequences he'd be in for.
- Height: 5 m
- Tendril Length: 3 m
- Weight: 210 kg
- Origin: Planet Beryl of S13 Star System
- Powers and Weapons
- Possession: Alien Beryl can possess human beings in a similar manner to a ghosts.
- Telepathy: They can communicate or read a person's mind.
- Helzzking: A robot weapon used by them.