Ultraman Wiki

Alien Coro (コロ星人 Koro Seijin) is an alien that appeared in Ultraman Leo.

Subtitle: Pleasant Man (快人 Kai Jin)


Ultraman Leo

One day while jumping his space bed, Alien Coro accidentally fell into the Earth, along with his bed. He was found by several children while they were playing as MAC. After Alien Coro fainted out of hunger, the children brought him to their play area. While trying to find a food he liked, one of them offered him a donut, which he ate.

Later, Renbolar, his monster flew from its home planet after being summoned by his master, much to both the children and Alien Coro’s delight, but it also caught the attention of MAC, who tried to evacuate the children. However, Alien Coro proved his control over the seemingly docile monster as he had him doing tricks such as backflips, silly poses, and magic tricks. At MAC's request for the city's safety, Alien Coro had to send Renbolar back home, but suddenly his tail was pulled out by the greedy kids who wanted more. This caused Renbolar to go wild and out-of-control, attacking the city they were in and even MAC as well. Luckily, a storm blew in and the rain frightened Rebolar away.

After the storm left, as Alien Coro was regenerating a new tail, Renbolar returned and devoured a rainbow that appeared in the sky, created by the storm. Because of this, his strength increased as he resumed his rampage. Gen then transformed into Ultraman Leo and thus the two did battle in a boxing-styled battle that went on for well over seven rounds until Alien Coro literally threw in the towel, hoping to keep his pet monster alive, which Ultraman Leo did by knocking out the monster. The next day, Renbolar awakened but was bounded in chains until Alien Coro’s regeneration was complete. But this didn’t stop the monster as it easily broke throw the chains and resumed his rampage. Gen once again transformed into Ultraman Leo to hold off Renbolar long enough for Alien Coro to finish his regeneration. Finally, the new tail was completed and Alien Coro regained control of his monster. Renbolar apologized to Ultraman Leo, who accepted the apology, as well as the city, and the children. Alien Coro and Renbolar then left Earth peacefully, while eating some of the donuts he received from the kids.


  • Despite looking and acting like a child, Alien Coro was actually very old as he mentioned that he had 43 children, 64 grandchildren and 14 great-grandchildren.
  • Alien Coro claims that his planet is 2,000 years more advanced than Earth.
  • One of his favorite foods is donuts.
    • He also likes music from Earth.
  • Alien Coro was proven to be a honest person, as he never lied to anyone before.
  • Alien Coro's planet was shaped like Saturn.


  • Height: 140 cm
  • Weight: 40 kg
  • Origin: Planet Coro
Powers and Weapons
  • Space Bed: Alien Coro had a bed which can fly in space. But if he falls from it, the bed will lose control and fall along with him.
  • Controller Tail: Alien Coro's tail can be used to control the monster Renbolar. If his tail removed, the monster will go rogue until he grows a new one, which takes about 20 hours.


Ultraman Leo

Ultraman Leo Kaiju
Giras Brothers | Alien Magma | Alien Tsuruk | Kanedoras | Alien Karly | Kendoros | Vekira | Guiro | Ron | Alien Kettle | Bango | Alien Vibe | Antales | Alien Flip | Alien Atler | Alien Wolf | Bat Girl | Batton | Alien Boze | Bock | Dogyuh | Alien Alpha | Northsatan | Garon | Littre | Alien Coro | Renbolar | Carolyn | Alien Sarin Dodole | Gamerot | Alien Clean | Satan Beetle | Pressure | Oni-on | Planet Apple Chicken | Alien Paradai | King Paradai | Uriy | Uringa | Alien Magma II | Rolan | Alien Virmin | White Flower Spirit | Princess Kaguya | Kirara | Alien Akumania | Ashuran | Sevenger | Taishoh | Alien Atlanta | Alien Mazaras | Specter | Alien Babarue | Black Directive | Black Star | Silverbloome | Black Dome | Absorba | Demos | Black Garon | Blizzard | Mayuko | Hungler | Black Terrina | Satan Mora | Nova | Alien Bunyo | Black End