Ichiro Sumishiba

One of Reiji's rivals who works for RI-ON. Struggling to fulfill his family's high expectations, he strives to defeat Hikaru and take his place as the number one Dragon Drive player in the world. He has the habit of saying to defeat his opponents in 10 minutes.

He later betrays RI-ON and joins up with Reiji's comrades to save the two worlds.

Cited from: Wikipedia