Tai Kamiya (V-Tamer 01)

Taichi Yagami (八神 太一) is the main character of the manga V-Tamer 01. He was a boy whose V-Pet had a Digimon thought to be a glitch, and for the most part looks like Digimon Adventure character of the same name, save for different clothes. But when he was transported he learned that 'glitch' was his partner, Zeromaru, a Veedramon. He met Lord HolyAngemon, who brought him to the Digital World to help them fight Daemon. Taichi agreed, and with Gabo as a tour guide to find the five V-Tags. He faced the likes of Etemonkey, the evil Digimon that guard the V-Tags. He even fought other humans, like Neo Saiba and the Alias III, who eventually helped him out. After he and Zeromaru defeated Daemon, Taichi and the other children returned to the Real World.

Taichi is the first Digimon protagonist to wear goggles.

There were a few team-up specials Taichi had with Davis Motomiya, Ryo Akiyama, and Takuya Kanbara.

Other appearances
In the Digimon Xros Wars manga, mentions having a Partner when he was younger and that the two saved the Digital World before.