Rive Shindou is Chrono Shindou's father and Mikuru Shindou's elder brother. He's also one of the co-founder of FIVA and the mysterious clan Gear Chronicle after some circumstances. Rive, Shin Nitta and Mark Whiting once formed a Vanguard team known as Team Nippon. Ten years before the events of Cardfight!! Vanguard G, Rive along with his best friend Ryuzu Myoujin were investigating the connection bewteen Earth and Cray. The research eventually lead to summoning Chrono Dran, however Rive soon found out that Ryuzu's goal is to sacrifice Planet Cray in order to turn Earth into a perfect world. When he was with Team Nippon, he used a Tachikaze deck focused on the skill Engorge. It is possible his avatar is Emperor Dragon, Gaia Emperor. (Source: Cardfight!! Vanguard Wiki)