Riser was the main antagonist in Vol. 2. Issei hated this man with a passion at first because he was "stealing" Rias away from the group, which Issei did not want. At the end of the Rating Game between Riser and Rias' peerages to determine whether Rias should wed Riser, Issei went against Riser but ran out of stamina and was beaten to near-death before being saved by Rias, who surrendered in order to prevent any further harm to him. He woke up three days later and went after her, interrupting the engagement party, and Sirzechs decided on a one-on-one battle. During that fight, Issei gave up his left arm to reach his Balance Breaker and ended up defeating Riser and taking Rias. Issei made him go into a depression due to the fact that he has never lost and also made him afraid of Dragons. La