Borr displayed a sassy and outspoken personality. Arguably the youngest out of four, Borr is shown at times to be snarky and a showoff, confident with his abilities and easily annoyed by Utsumi and (to a lesser extent) Calibur's antics.
Borr showed up with the remaining two Junior High students after Anti had defeated Gridman and Calibur. The trio invited themselves into the Junk shop, already aware Gridman was alive. Borr used Rikka's phone to tell Calibur to come out of Junk. Go'yavec, and combined with him to form Buster Gridman.He and the other Assist Weapons continue to fight alongside Gridman and Yuta. Borr entered the battle for the first time when Gridman had to face off against
To awaken Gridman's true form, the Neon Genesis Junior High Students gained Acceptors and were integrated back into Gridman for the final battle. After that was over, he departed with Gridman back to the Hyper World.
- Height: 133 cm
- Weight: 32 kg
- Powers and Weapons
- Knife: Borr has a combat knife.
- Transformation: By shouting the Access Code, Borr can transform into Buster Borr to aid Gridman in battle.
- Acceptor (アクセプター Akuseputā): Used alongside the other Neon Genesis Junior High Students, Anti and Yuta to transform into Gridman's true form.
"Access Code: Buster Borr!"
- ―Borr's transformation call.
- Twin Drills (ツインドリル Tsuin Doriru): Buster Borr's twin drills. They can be used to drill into and out of the ground.
- Missiles: Borr is able to launch missiles with different effects.
- Forest Extinguisher Missile (フォレスター消火弾 Foresutā Shōka-dan lit. Forrester Fire Extinguishing Missile): These missiles explode into a burst of water to douse fires.
- Sydney Super Adhesive Missile (シドニー凝固弾頭弾 Shidonī Gyōko Dantō-dan lit. Sydney Coagulative Warhead Bullet): Missiles which explode into a pink goop upon impact, acting as glue to keep the enemy locked in place.
"Full Armor Combine! Buster Gridman!"
- ―Combination announcement
- Drill Attack Mode (ドリルアタックモード Doriru Atakku Mōdo)/Terrain Travel Mode (地上走行モード Chijō Sōkō Mōdo Unused): Although never used in the series proper, appearing only in the opening, Gridman can use Buster Borr's wheels to gain additional speed on land.
- Guns: Gridman can use the wheels of Buster Borr to launch rapid-fire bullets, similar to a Gatling gun.
- Forest Extinguisher Missile (フォレスター消火弾 Foresutā Shōka-dan lit. Forrester Fire Extinguishing Missile): One of Buster Borr's abilities, Gridman can use these to put out fires over a wide area.
- Buster Grid Missile (バスターグリッドミサイル Basutā Guriddo Misairu): Conventional missiles fired from Buster Borr's treads.
- Twin Drills (ツインドリル Tsuin Doriru): The drills of Buster Borr, their default mode is the Driller Mode (ドリラーモード Dorirā Mōdo), and can open up to reveal plasma cannons in Buster Mode (バスターモード Basutā Mōdo).
- Twin Buster Grid Beam (ツインバスターグリッドビーム Tsuin Basutā Guriddo Bīmu): Buster Gridman's enhanced Grid Beam, fired from the Twin Drills in Buster Mode.
- His counterpart in Denkou Choujin Gridman is Twin Driller, the second of the God Zenon set of Assist Weapons created and controlled by Ippei Baba and Yuka Inoue to assist Gridman.
- His name is based off of Borr, the English name for the Twin Driller in Superhuman Samurai Syber-Squad.
- The names of the missiles he fires are a reference to Syndey Forrester, the default pilot of Borr in Superhuman Samurai Syber-Squad.
- Widely presumed to be female, Borr's voice actress Aoi Yuki confirmed on Twitter that Borr is in fact male. Even Aoi Yuki acknowledges this surprising twist and calls him "Borr-chan-kun" (ボラーちゃんくん Borā-chan-kun).
- The brooch on his vest is a reference to the Dinobot, Scorn, from Transformers Age of Extinction.
- When combined with Gridman, Borr's components took a similar appearance to Drill Max from Brave Fighter Exkizer.
- Borr is very proud of his tank form's twin drills despite the fact, as Vit stated, they are mostly just for show.
- Borr's drills are similar in appearance to the drill arms of the Godzilla Kaiju/Robot Heisei Moguera from Godzilla VS Spacegodzilla.
- A recurring gag with Borr is that he kicks the shins of whoever annoys him. Sho is frequently on the receiving end of this.