DALLAS
"Dallas and Vi returned to Runeterra, where the two settled down. Vi retired from her old fighting ways, and had two children with her lover. Although Vi was more than happy to quite her old life style, Dallas had an itchy trigger finger. He went out and robbed the towns and people of Valoran. He started a new gang to replace his old one, featuring Gangplank, Fiddlesticks and Rengar. They were known as the deadliest and most ruthless gang in the region, until their group was finally captured. Dallas and his gang were all executed by being burned at the stake. Vi and her children mourned for days."
Here's Dallas's non-canon one, that has no semblance to the actual story as Dallas turned away from his ways and will still be alive. And don't worry, I won't just randomly kill your characters without asking you guys if you want to keep them for a later event.