Gaku HoshikawaAKA Five Red. The eldest of the Hoshikawa siblings, when he was a kid, he shot Galois on the face out of fear, instigating their rivalry. As of present day, he's a science teacher, mostly dabbling in plant life/biology. Is scared of ghosts.
- Cool Sword: V Sword
- Bifurcated Weapon: V Sword + Power Grip = V Shuttler.
- Disney Death: Died, but immediately got better thanks to Kazumi.
- Genius Bruiser
- Law of Chromatic Superiority
- The Leader
- Promotion to Parent: Assisted with Arthur.
- Signature Move: V Sword Spark
- The Smart Guy: A science teacher.
- Team Dad
- Why Did It Have to Be Ghosts?
Ken HoshikawaAKA Five Blue. Second eldest of the Hoshikawa siblings and the closest Gaku could get for friendly rival/second in command. He teaches physical education (swimming), making him the strongest fighter on the team.
- The Big Guy
- The Lancer
- Leeroy Jenkins: Instigates one in the second episode, which puts himself and his siblings in a pinch, until Gaku bails them out.
- Mundane Made Awesome: Dodges like a Blitzball player.
- Signature Move: Rolling Arrays
- Weapon of Choice
Fumiya HoshikawaAKA Five Black. The twin brother of Remi and the youngest of the Hoshikawa siblings. Eventually becomes a language teacher, which grants him a lot of linguistic abilities and the ability to understand alien languages.
- Kid-Appeal Character
- Knife Nut: Two of them; Power Cutter and Cutter Discs.
- Bifurcated Weapon: Power Cutter + Power Grip = Black Jaw.
- Signature Move: Screw Cutter
- The Smart Guy: The go-guy to moonspeak with aliens.
Kazumi HoshikawaAKA Five Pink. Third-born and oldest daughter of the Hoshikawa Family. Has a computer-like brain which enables her to quickly analyze enemy weakness. This kind-hearted woman is a math teacher too.
- Cool Sword: Cutie Circle
- Despair Event Horizon: Which caused her to defect, but turns out that she's a...
- Fake Defector: She defects just to trick the monster into reviving a dead Gaku.
- Good with Numbers: A Math teacher, and all.
- The Heart
- Signature Move: Circle Finish
- The Smart Girl: See Good with Numbers.
- Team Mom: Sometimes, even when she's got two big brothers.
- Tomboy and Girly Girl: Girly Girl to Remi's Tomboy.
AKA Five Yellow. The fourth-born and the older twin sister of Fumiya. She teaches music, but is the bonafide Action Girl. Knows Kung Fu and would teach children those in spare time.
- Anime Chinese Girl: Occasionally wears this kind of look since she utilizes Kung Fu.
- The Chick: Of the Action Girl variety.
- Drunken Master: Once mastered the Drunken Fist.
- Signature Move: Tact Attack
- Tomboy and Girly Girl: Tomboy to Kazumi's Girly Girl.
- Whip It Good: Melody Tact
- Big Bad: Subverted. It turns out the real Empress Meadow died years ago and that the Empress Meadow who has been giving orders to Zone is an illusion created by Vulgyre.
- Badass Mustache
- The Captain
- The Dragon
- Law of Chromatic Superiority
- Good Scars, Evil Scars: Gaku gave him one years before the series, which established his rivalry with FiveRed.
- Villain Decay: Once a genuine threat, but after a few failures and Chevalier's appearance, he decayed so much that he becomes a bumbling comic relief villain and demoted to janitor. He did restore his decay in the last arc, though.
- Greed: He really loves money...
- Karmic Death: Which leads to getting him crushed by it.
- Team Pet
- Bishōnen: Even Remi and Kazumi were charmed by his good looks. And yes, that includes Doldora and Zaza. And Meadow/Vulgyre too!
- Dragon Ascendant
- Big Bad
- Expy: Hm, a living being disguised as something people can travel on who destroys planets and manipulates followers? Hey, we have another Bazoo!
- The Man Behind the Man: Subverted and played straight; he's both the Man and the Man Behind the Man.
- Manipulative Bastard
- One-Winged Angel: Galactic Super Beast Vulgyre
- Walking Spoiler
- Weaksauce Weakness: He's weak to a specific flower.