"Whew! What a day. So, wanna head to Tapper's, Ken?"
Ryu is one of the main characters in the Street Fighter series of fighting games. Along with Ken he uses the "shoto" style of martial arts. In the movie he appears in his game and in the Tapper bar scene. He asked Ken if he wants go to Tapper Bar with him. He is also seen at the wedding of Felix and Calhoun on the groom's side.
Ryu with Ken
A picture of Ryu, as seen at Tapper's.
Ryu attending the wedding at the far back of the left.