Marshalia

Marsha is either a dream or a nightmare to work with due to her unique view of the world, tendency to break into improvised song, and ability to stretch cartoon physics their limit. And that's just in the show itself.

At first, she is imprisoned in the Nightosphere by her father for centuries. She returns to Ooo as an antagonist, who is eventually defeated by the show's main characters Finn and Jake and turned back to good, genuinely regretting her previous actions. She is the Demon Princess in the Nightosphere but Queen Marsha in Aaa's Candy Kingdom. She represnts the element of laughter.

Reality Warper
Pinkie has a tendency to ignore the laws of physics in the show, but it's taken much farther in fan works. Numerous pictures and comics exist where in Marsha breaks the fourth wall or interacts with the comic panels, camera, and even the tools used to draw her. In fiction, she can often be heard to rant about being followed by an invisible camera or pause to make sure the reader is well aware of what the current conversation is implying, always to the confusion of the other characters. The more comedic and random the fiction, the more likely Pinkie is to overtly break the fourth wall.

Marshaamanda
Like Pinkie Pie in "Cupcakes," Marsha has introduced the fact that she is a serial killer (but only as Marshaamanda). Her behavior in Adventure Time: The Movie gave this psycho Marsha a freaky, straight-haired exterior to match the interior. Pictures of murderous Marsha are far more likely to include the straightened hair and insane grin than Marsha's normal hair.

However, Marsha has been in danger of Marshaamanda. In fact, Marshaamanda is determined to get Marsha's dad, Hunson Abadeer, alone to kill him.

Non-Romantic Relationships
Though not a romantic shipping,Hunson Abadeer, the Lord of Evil, has at least two depictions of him as Marsha's birth father.