|First appearance:||Ultraman Dyna Episode 41: I Want to See Our Earth|
Subtitle: Large Space Insect (宇宙大昆虫 Uchū daikonchū?)
Three years prior to the series, Diaorius attacked a TPC base that was under construction in Pluto.
Now in 2017, a TPC spaceship Gazelle, was sent to brought several Neo Frontier Jupiter-born children to Earth. Diaorius at that time, hanging on an asteroid, detected the Gazelle's signal and made its way to the ship but attacked by its defense system. However, before the monster went away, it had just implanted its larvae on the ship. Super GUTS detected this and to make things worse, if Diaorius' egg hatched on Earth, the fluid which came from the egg will vapourise into a poisonous gas that will kill millions of people on Earth in a wide scale. The larvae were released inside the Gazelle and the small insect began to hunt. Normal firepower had no effect and it moved through the halls. When it trapped one of the women and leaped at her, one of the Super GUTS members fired at it, instantly vaporizing it with his laser.
Soon Ultraman Dyna came up to fight the adult Diaorius earlier. As the humans inside fended off the tiny larva, Diaorius began to drain Dyna’s energy. The hero managed to get free, however, and push the monster back before hitting it with the Solgent Ray, vaporizing the flying creature.
- Diaorius' roars were reused from Gyanzar.
- Diaorius are speculated to be asexual, being able to lay eggs without a mate.
- Height: 70 cm
- Length: Unknown
- Weight: 25 kg
- Origin: Space
- Energy Blasts: Larvae Diaorius can fire energy blasts from its antenna.
- Poisonuos egg fluid Larvae Diaorius could emit a poisonous egg that can vapourise into a poisonous gas which will kill millions of people on Earth in a wide scale if the egg fluid entered Earth atmosphere.
- Height: Unknown
- Length: 115 m
- Weight: 65,000 t
- Origin: Space
- Flight: Diaorius can fly with its wings on moderate speed.
- Signal/Radio Wave detection: Diaorius can detect radio waves with its antenna.
- Energy Blasts: Adult Diaorius can fire missile-strength energy blasts from its antenna.
- Mandibles: Diaorius can clamp in with the enemy with its mandibles.