Gunpei is a former dectective, who wanted to be a Go-onger on his own without any help from the others. He believes alone he is an excellent hero. Of course being trained as a cop, he is a skilled marksman, in which he has no rival, he has the advantage when it comes to sleuthing. His nickname is Chaser. As Go-On Black, he has astounding reflexes and is able to corner enemies easily. He steals Bomper and the Engine Attache with the Engine Casts inside. When he sees the three Go-onger in trouble, he returns the Engine Casts, when he and Hanto transform into Go-ongers. He has a sub-par skill in lip reading which of course has a percentage of failing due to distance and obstructions. He can be very stubborn at times and clashes with Sosuke because they don't see eye to eye. Gunpei is the most level-headed of the team, he was able to deduce something was awry in Episode 11 when everyone's dreams were coming true. This was caused by the Gaiarc and unfrotunately, he was 'wanted' by the police. He might seem serious and cold, but of course he has a soft side and he does care about his teammates. He does manage to loose his composure but refuse to admit any flaw in his character or in his actions. However, he is not above to showing any stupidness of his teammembers, especially Sosuke. As for Hanto, he sees him as a little brother and protects him and looks after him. Gunpei met Gunpherd in Episode 4 and they are very much alike, so much that Gunpherd refused to be partners with him. Gunpherd's Engine Cast was found by a little boy and Gunpei and Sosuke tried their best to retrieve it and Gunpherd finally accepted Gunpei as his partner after witnessing his valor. They have been tight ever since. "Dash Dynamic!! Go-on Black"