User blog comment:AVP3/Oh, Fionna.../@comment-8484378-20130805193335

While i would probably prefer Fumball, I would have to say NOBODY.

Fionna is a perfect example of how a ship doesn't happen because it doesn't need to. Unlike Finn who desired a romantic relationship, Fionna doesn't have any interest in the boys who hit on her, she desires to be herself alone and doesn't want somebody to establish herself for her.

Maybe Gumball would be a perfect boyfriend for her, but this would most likely overconvolute her due to their different natures and personalities. Marshall would likely be a better boyFRIEND, he might be more entertaining and fun than Gumball, but he's too immature for her and lacks empathy, so he'd be an even worse romantic partner than Gumball. And I don't know anything about Flame Prince and Fionna.