Fionna Campbell | Watching a Crappy Horror Movie with Her

Personality and Traits: Fionna is a fearless, thrill seeking, adventure loving hero, much like her male counterpart, Finn. She will rescue any prince from the Ice Queen or take on any task to help others. The Ice Queen once called her somewhat tomboyish, which fits, since she often acts like one of the guys and fits right in with friends like Marshall Lee and Prince Gumball. She usually stays calm, but she can be provoked to anger, and she is very hard headed, as shown when Cake wanted her to date Prince Gumball and she stayed stubborn about it.

In "The Prince Who Wanted Everything", Fionna shows an ignorant attitude toward Lumpy Space Prince. This seems tied to Lumpy Space Princess' stories, however, since LSP has a very similar personality.

When her reality lost their magic, Fionna lost all memories of her adventurous life and became an ordinary human. She felt deep discontent following this, seeing the world she now lived in as boring, and wanted something more, which left her jaded and depressed over this period of time. Fionna bounced through many jobs, hated every single one, and often got herself fired. Time with friends was the one thing that looked like enjoyment, though it may have been to save face, since she still felt sadness inside and did not always hide it around them. She also developed a strong taste for sugar and openly claimed she has no impulse control.

Upon landing in the Land of Ooo, Fionna was thrilled to be in a world of magic and longed to explore. Even without her old memories, adventure still felt natural. She is strongly attached to free will and disliked the idea of having to return to her reality while it lacked magic. After seeing what her world used to be, she wanted to reclaim that wonder by going on an adventure. Through her adventures and interactions with Simon, she showed that she is a romantic at heart, genuinely enthralled by how he and Betty met and fell in love. Like Finn, Fionna carries a heroic spirit and a desire to help others, but she also has clear flaws. She can be self-centered, deeply short sighted, and irresponsible, exacerbated by her depression and a lack of direction after losing her original purpose and being trapped in a mundane life. In that state, she focuses on her own troubles and can become dismissive and apathetic toward others. During a discussion about dreams and their meaning, she brushes off everyone else's dreams except her own, saying only her dreams matter. Gary and Marshall Lee say she has a history of flaking and disappearing for stretches of time, and she frequently freeloads off both of them. Unlike Finn, she is often ill equipped in combat and self defense, since she was never taught those skills. In this, she is shown to be defined by feelings of being owed a life she'd been denied.

While traveling the multiverse, Fionna at first treated each universe and its people like a video game and seemed indifferent to the impact of her actions. She was dismissive of Simon's advice and struggles until she got to know him better. Her excitement for adventure made her extremely reckless and easy to manipulate, which caused damaged across the multiverse and multiple people to be killed, a burden that soon started to haunt her. Misled by the Winter King, she injures innocent people, then realized she is not well prepared for adventuring and starts to spiral into shame and self doubt. This worsens after arriving in the Vampire World and getting someone killed due to her recklessness, and worsens again after she accidentally strands herself, Cake, and Simon in the Extinct World. The buildup of these events leaves her traumatized and deeply guilt ridden, leading to even more reckless choices, now driven by fear rather than carelessness. Like most iterations of Finn, Fionna is driven by kindness and a need to protect others. She desperately tries to protect Cake from the Vampire King. She hides the Ice Crown to keep Simon from being cursed again after she comes to understand his trauma, showing that she is willing to sacrifice her own happiness and existence for his sake. Later, even when Scarab threatens total annihilation, she insists that Simon must not put on the crown and states her wish to fight for her world as it is. These moments show her wish to be a force for good, not a hero for glory or violence. They also reveal her capacity for introspection, self reflection, and empathy, even though she still struggles to fully think things through.

After saving her universe, Fionna began to be treated like a hero in her world. However, not everyone treated her kindly and still considered her a screw up. In this new status quo, Fionna has seemingly developed a mild hero complex, taking it upon herself to help everyone in need, but once again becomes rather careless and inconsiderate towards her friends feelings while trying to help them out. However, she remains deeply insecure due to her struggles with adapting to adult non-magical life, and develops feelings of inadequacy towards Finn. This self-loathing is complicated further by her romantic failures (as well as trauma from her encounter with the Winter King) leading Fionna to reveal a jealous and uncommunicative side. After multiple failures to help Marshall Lee and Gary, and complications in her love life, It becomes clear that Fionna tries to help others to distract from these feelings of inadequacy, but ultimately, as things turn for the worse as she feels unneeded by them. Fionna begins to act self-destructively and deeply damages several of her relationships by betraying their trust. She immediately regrets these choices, and begins to spiral, believing that she's been nothing but a burden towards them. After some introspection and insight of the troubles of her friends and Finn, and learning from Fern who once had similar struggles, Fionna realizes that almost everyone struggles with shame, regrets, and baggage from their past. She doesn't need to be ashamed about having her own struggles and insecurities, and that life is better lived without denying those feelings to chase a happy ending.

Appearance: Fionna is a female human who has fair skin, blue eyes (though they typically appear as black dots), and thick legs. She is somewhat more heavy-set than her counterpart Finn and is called "chubby cute" by Natasha Allegri. Fionna wears a white, rabbit-themed hat (similar to Finn's bear-themed hat) with exposed locks of blonde hair covering part of her face. She has long, shiny, blonde hair that she almost always keeps tucked away in her hat. She has missing teeth like Finn, but she is also shown to have buck teeth in several episodes, which help add to her rabbit-like appearance.

For attire, she wears a blue shirt with elbow-length sleeves; a short, dark-blue skirt; white, over-the-knee socks with two thin, light-blue, horizontal stripes at the top; black Mary Jane shoes; and a two-toned green backpack.

In the Adventure Time: Fionna & Cake episode "Destiny" she wears a black sport bra, black knee pads, brown shoulder strap and silver shoulder armor with three spikes, brown belt, white ankle socks and brown boots. In "The Star", she wears Martin Mertens's green military jacket.