Hiryū Tsurugi/Change Dragon | Actor: Haruki Hamada
The leader of the team. A star baseball pitcher with the trademark technique Dragon Ball (not THAT. Or that.). He tends to get emotionally invested in cases he's involved.
- Chick Magnet: Despite not even trying, he has the most girls to link with. Mostly with Nana, but he's also teased with Sayaka, and later developing links with Shiima after her Heel–Face Turn.
- There's also character-of-the-day Ira, an alien childhood friend of his played by Yoko Nakamura (who would go on to play Yellow Flash the following year).
- Dynamic Entry: DRAGON KICK!
- Law of Chromatic Superiority: Has the Dragon Ball, Dragon Kick, as well the most link with the aliens.
- The Leader
- Our Dragons Are Different
- Ship Tease: With Sayaka in Episode 19.
- Shock and Awe: Dragon Thunder
- Standardized Leader
Shō Hayate/Change Griffon | Actor: Kazuoki Takahashi
The sub-leader of the team, as well as Handsome Lech, whose trademark style is to comb his hair, sometimes in the middle of battle. At first joining the army just to get the girls, he develops from it.
- Butt-Monkey: Is usually the butt-end of light-hearted mistreatments.
- Dishing Out Dirt/Playing with Fire: Griffon Magma Galaxy
- Handsome Lech: And how.
- The Lancer
- Our Gryphons Are Different
Yūma Ōzora/Change Pegasus | Actor: Shiro Izumi
Probably the youngest of the team as well as a weapon expert. Is pretty good at handling children and animals, but has the most fragile heart, causing him to get a mental breakdown at one point. Is a horrid singer.
- Dreadful Musician: Ergh... To be fair, it helps against a Monster of the Week, though.
- Heroic B.S.O.D.: At one point when they lost their power, he thought he got called by Earth Power, despite his friends convincing him otherwise. Turns out they're right, proving that he got a mental breakdown.
- Kid-Appeal Character: Alongside his ability to get along well with kids and animals, he's the most fragile mentally, falling to Heroic B.S.O.D. at one point.
- Masculine Girl, Feminine Boy: Feminine Boy to Mai's Masculine Girl.
- One of the Kids: Not too childish, but yeah.
- Reverse Grip: How he holds his Change Sword.
- Shock and Awe: Pegasus Inazuma Spark
- The Smart Guy: Despite his fragile personality, he is a weapon expert.
Sayaka Nagisa/Change Mermaid | Actress: Hiroko Nishimoto
The brain of the Earth Defense Force and a sticker to etiquette and manners, pretty much a 'Miss Perfect'. She's a motherly type and like Tsurugi, tends to get involved emotionally in her missions. Usually teams up with Mai.
- The Chick
- Making a Splash: Mermaid Typhoon Wave and Mermaid Big Wave.
- Our Mermaids Are Different
- Panty Shot: Thanks to her rather short skirt.
- Ship Tease: Episode 19, with Tsurugi.
- The Smart Girl: Not only is she the obvious 'brain', but she keeps her emotions more in check.
- The Strategist
- Tomboy and Girly Girl: Girly Girl to Mai's Tomboy.
- Wounded Gazelle Gambit: Only appearing once, but she did sucker Mai once with faking a cry.
- Wrench Wench
- Yamato Nadeshiko / Proper Lady: Etiquette, motherly, kind, is said to be a good mother (she posed as a mother in Episode 12 and did such a good job of it that even the enemies were fooled).
Mai Tsubasa/Change Phoenix | Actress: Mai Ooishi
Tomboyish, light-hearted officer, who tends to get underestimated due to her sex. She's best friends with Sayaka even though sometimes her "prim and proper" feel kinda gets on her nerves.
- Badass Biker: While Tsurugi is the one who does his patrols on bike, she fits the mold better. See Episode 15 for proof.
- The Big Guy: On the virtue of the tomboyish Action Girl.
- Masculine Girl, Feminine Boy: Masculine Girl to Yūma's Feminine Boy.
- Master of Disguise
- The Phoenix
- Playing with Fire: Phoenix Fire (Bomber)
- Short Tank
- Tomboy and Girly Girl: Tomboy to Sayaka's Girly Girl.
- Tomboy with a Girly Streak: With her color.
Commander Ibuki / Yui Ibuki | Actor: Jun Fujimaki
- Big Good
- Gender-Blender Name: Yui and Ibuki are most commonly used for female names. This commander on the other hand is a very hardass and manly commander.
- Human Alien
Nana | Actress: Miyako Hayakawa (child), Tokie Shibata (teen)
- Plot-Relevant Age-Up: In her first appearances, she was a child, but once Ahames absorbs the Rigelian Aura from her, she becomes a teenager and stays that way for the rest of the series.
Star King Bazoo | Voice actor: Seizo Kato
- Big Bad
- Eldritch Abomination
- Eldritch Location
- Genius Loci
- I'm a Humanitarian: A Planet Eater who IS a planet.
- Planet Eater
General Guiluke | Actor: Shohei Yamamoto
Adjutant Booba | Actor: Yoshinori Okamoto
Adjutant Shiima | Actress: Kana Fujieda; male voice by: Michiro Iida
- Dark Chick
- Heel–Face Turn
- Larynx Dissonance: Has a very deep male voice thanks to Bazoo's mind conditioning on her.