Kohei Aoyama

From Janime

Kohei Aoyama
Yu-Gi-Oh! 5D's
Dub Name	Alex
First Appearance	Episode 09
Known Relatives	none
Signature Card	unknown
Seiyuu	Shun Takagi
VA	Pete Zarustica

Kohei Aoyama (青山光平 Aoyama Kouhei) first appears at the detention center, when Yusei was transferred into his room. He then tells Yusei he's planning to escape, and invites him along.
During Yusei's duel with Takasu, he fixed the system that Takasu had rigged to prevent himself from getting shocked.