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Cathy (キャッシー Kyasshī)[1] is a monster that appeared in episode 29 of Ultraman 80.

Subtitle: Valley Monster (渓谷怪獣 Keikoku Kaijū)


Ultraman 80

Every hundred years, a monster was said to appear in the Kiya Valley's village. In that year, the village chief decided to use the legend as a tourist attraction strategy, placing fraudulent records of monster roars in various areas and even name it Cathy, after their own village. However, the real monster awoke.

When UGM attacked, they could not faze the creature with the weapons. However, they found that it would run out of energy if it did not eat meat. When it tried to eat two villagers, Takeshi transformed. 80 and the monster battled, while Cathy tried to eat the hero himself. Ultraman managed to defend himself until the monster collapsed from hunger.

80 then flew the monster to a place where it could return to sleep undisturbed.


  • Cathy's roar is a modified Gabara roar.
  • Cathy uses a modified Crescent suit.
  • Because of their uncanny resemblance (color and appearance), Cathy was compared by UGM members to Ghostron from Return of Ultraman. However, the episode exaggerated a few key features, including that Cathy being four times bigger and requires to eat 1000 kg meats to stay active.
  • Cathy being used as an attraction by the village chief and its name may be a reference to the legend of the Loch Ness Monster, referred in the Japanese as Nessie (hence the theme naming).


  • Height: 60 m
  • Weight: 30,000 t
  • Origin: Underneath Kiya Valley
Powers and Weapons
  • Burrowing: As Cathy only appeared once a few hundred years, the monster can remain submerged underground while still being alive and unharmed.
  • Fire Breath: Cathy can emit a stream of flame from his mouth.
    • Smoke Breath: If Cathy runs out of energy, his flame breath will be smoke breath instead.
  • Telekinesis: Cathy can use telekinesis to bring his prey closer.
  • Strong Jaws: Cathy has strong jaws.



Ultraman 80 Kaiju
Crescent | Gikogilar | Hoe | Zandrias | Alien Bam | Mechagiras | Abdolaars | Noiseler | Tabra | Gabishale | Jakki | Aruma | Zuruzla | Medan | Alien Vibros | Gora | Alien Gorgon | Saramandora | Zarudon | Myu | Devilon | Alien Ruria | Sawako Hoshi | Lavras | Daron | Gymaira | Gaus | Okorin Ball | Alien L85 Zuckal | Gamos | Underground Men | Queen Einus | Gomora II | Amoeza | Alien Fantas | Robo-Fo | Argon | Akuzone | Gera | Alien Argo | Val | Zakira | Cathy | Alien Zatan | Zatan Silver | Zora | Barrack Ship | Gazera | Angoras | Fire-Draco | Guwaganda | Baltan Warship | Alien Baltan V | Ghostdon | Tetsuon | Space Plant | Jihibikiran | Barebadon | Zurasuimar | Alien Galagala | King Galtan | Delusion Ultraseven | Alien Baltan VI | Marjin | Red King III | Glovusk | Idatenran | Plazma | Minazma | Margodon