>le character fucks off after playing their part, and they're never seen again
So?
We're roving men. This is literally how it should be. We arrive at a new city, meet new people, fight some enemies, fix their shit, then fuck off to the next destination.

You wanna settle down, get married, and start a family with every hoe that throws herself at you? Lmaoing at you, pathetic simps.

Rover has a higher purpose; he're trying to save the fucking world, and he has no time to waste with these desperate girls. He's so far above their league, it's actually insulting that they're breathing the same air as him.