Takuya Kanbara

From Digimon - NeoWiki

Takuya is the "goggle-boy" of Digimon Frontier, meaning he is both energetic and athletic. He tends to act without thinking, but he always tries to do what's right. Takuya is very hot-headed, and this leads him to get into many arguments, especially with Koji. However, Takuya is also very compassionate, which he shows by acting like Tommy's older brother.