Did we play the same game? However you define "rape," Setzer was an amoral gambler and rogue whose idea of romance was kidnapping and forced marriage. His relationship with Darril was mostly one of sport. He planned to kidnap the opera singer, was duped into kidnapping Celes instead, and was only willing to help them save the world or whatever if Celes married him. She only got out of that by challenging him and literally beating him at his own game (gambling).
Setzer was misogyny incarnate...Darril, someone he had an actual "relationship" with, was only ever his girlfriend. The opera singer, he wanted to marry on sight. Dude's priorities were seriously fucked.