|Home world:||Planet Guts|
|First appearance:||Ultraseven episode 39 "The Seven Assassination Plan Part 1" (1968)|
|Affiliation:||Alien Guts (master)|
Subtitle: Bold Strength Monster (豪力怪獣 Kōryoku Kaijū?)
- Height: 45 m
- Weight: 13,000 t
- Origin: Planet Guts
Aron was a monster sent by Alien Guts to test Ultraseven's strength and abilities while they analyzed from the safety of their saucer. Both the Ultra warrior and Monster fought on a few occasions but ultimately, Aron was killed when Ultraseven decapitated him with the Eye Slugger. However Aron's assignment was now complete and the Alien Guts have the information they required to assassinate Ultraseven.
- Despite having wings, Aron was never seen flying.
- Aron's roar is a slowed down roar of the Toho Monster, Baragon.
- Aron is one of the monsters that appears as a picture on the wall of Yuriko's room in episode 18 of The Ultraman.
- Since Aron's name was known by Dan, it could be assumed that they are a species from M78 or that Dan encountered one previously before coming to Earth.
- Although not physically seen, Aron is one of the monsters that makes up Beryudora's neck in Mega Monster Battle: Ultra Galaxy Legend The Movie.
- The Shout Factory subtitles of Ultraseven call Aron, “Arlon”.
Powers and Weapons
- Invisibility: Aron can camouflage himself to hide from enemies.
- Hooks: Aron has a hook for each hand and foot he can use to swing at foes.