Bomper Height: 66cm Weight: 66kg Speed: 66 km/hr Bomper was created by the Engines, he is a small Support Robot that supports the Go-onger in various circumstances with various equipment. Bomper also helps develop new tools to fight the Gaiarc. Bomper is capable of jumping long distances. He hides in secret from others. He was kidnapped by Gunpei in episode 2. Bomper says his name is an anagram for "Born-to Outerdimension and Mechanic x Pitcrew-type ENGINE-support Robot."

Fui Toujirou Sousuke's former race car team supervisor. He was surprised by Sousuke's aburpt depature. He witness him and his team transforming to fight a monster. He clarifies to Sousuke in a moment where he was waiting for a miracle, that hard work and teamwork is what makes things work, not miracles. Appears in Episode 8.

Seji He is a young popular flutist who was saved from Speaker Banki by Saki in Episode 6. Sousuke believed she was in love with him. He helped her point out a weakpoint in the monster.

{Tree Spirit} Not named, this seemingly lost boy once kept Saki company while lost in a forest ten years ago. She gave her strength by teaching her English word 'Smile' and stretching her cheeks, that she would carry with her and continue doing so. In current time, she thought he was a lost boy and protected him from a monster from the Samuari World. When she realized he was the same boy who kept her company those years ago, he shared his energy with her to defeat the monster. He later returned into himself, a tree.