Junpei (ジュンペイ) is a hyper-active young Japanese boy who loves astronomy and airshows! He totally freaks out under stress and uses a lot of exclamations! This apparently makes him the ideal ally of the Autobots!
Comics Bom Bom Generation 2 comic
When the Decepticon Cyberjets later attacked the Self Defense-Force airshow near Mount Fuji, Junpei defiantly threw a rock at Space Case! This proved to be a bad idea, but Electro intervened to save him from being squished, and gave him a totally rad hoverboard!
After Megatron's defeat, Prime observed that Junpei 'looks functional' and asked him to be the Autobots' human ally to help protect Earth's precious forestonite, a newly discovered super energy source!