Grenyn t1_iu8or9q wrote

League of Legends, yes. The demon looking thing is part of a semi-race (complicated) of beings that were sealed into weapons, becoming the weapons themselves. They try to persuade people to pick them up, after which they take over their body and reshape it closer to how they once looked.

The guy with the braid grabbed a weapon like that, but could resist the weapon's influence. So now they're constantly fighting for control over the guy's body, with the demon thing always looking for moments of weakness where he can destroy the other guy's mind, effectively erasing him.

They can converse, and of course, it's funny if they squabble in-game, but they're literally mortal enemies.