She, along with her pet deer-fox, Twig, her mother, Johanna, and her friends from the city of Trolberg as well as a little elf named Alfur and its surroundings, embarks in a multitude of supernatural adventures, encountering a diverse cast of magical creatures. Hilda is an 11/13-year-old girl whose hair comes in a bright cerulean color, making her stand out from everyone else. Her typical outfit, which she wears both indoors and outdoors, consists of a black beret, a yellow scarf, a red sweater with yellow cuffs, a blue skirt, which is the same cerulean, blue color as her hair, black tights and red wellington boots. She has a Caucasian complexion, like her mother and father. She often has a brown, sling knapsack, in which she carries various items, including her sketch book and a pencil. When she was turned into a troll, Hilda still retained cyanic hair (all vines and slightly longer and grayer in tone), but she had uneven teeth, and her skin became pale white in Cyan and stone-like with small lines across her body along with an elongated nose most common for trolls. Unlike her human form and her troll form in the graphic novels, Hilda was transformed into a three-toed troll in the movie similar to Trundle instead of having four. When in shadow, her eyes would glow with a signature red shine. As a troll, Hilda had no clothing due to it being swapped with Baba by the changeling spell. As a troll rock after being petrified by the sunlight, her body and limbs were merged into a typical rock formation with a long nose, but the top of her head retained the general shape of her hairstyle. In the graphic novel, the cracks on Hilda as a troll rock are deeper and more pronounced than in the movie. In addition, the front half of her rock form is more “L” shaped in the movie as opposed to the graphic novel where she became more of a round-shaped rock. Hilda is an extremely adventurous and fearless girl. She loves to draw in her sketchbook and is very kind to nature. She is shown not to get scared easily by monsters and can outrun and outsmart them. Hilda is a strong, determined and adventurous girl, she’s also very compassionate and caring, especially towards her family and friends. She is friendly generous and kind, but also has a wild and mischievous side. Hilda loves exploring new places and discovering exciting things, often putting her curiosity above safety. Hilda is quite independent and responsible, dealing with her fair share of challenges and adventures. She is also known for her honesty, (mostly,) courage and bravery and slight rudeness throughout the seasons. She can sometimes have a rather rude side, as she is known to frequently get annoyed and argue with her mother when things don't go her way. She is also prone to be mischievous in the graphic novels (for instance taking her role of pretending to be injured for first aid practice of the Sparrow Scouts too far or going on secret adventures without her mother knowing). Hilda hates having to disappoint people, especially her friends or her mother and always tries her best to help and support others with their needs, occasionally taking risks to fulfill one's request. She is very brave and caring. She is usually very happy and generous. Hilda's personality traits are shaped by her experiences and environment, but she maintains her unique curiosity and sense of adventure even as she grows up. Hilda lives with her mother, Johanna. While the two of them can argue from time to time (though notably more so in the graphic novels than the animated series), they love each other deeply. Season 2 sees a temporary dip in their relationship when Hilda begins to lie to Johanna about her adventures and is grounded by her twice, but in Season 3 they are on good terms again. Hilda has a pet deerfox named Twig, whom she loves very much. The two have been together for at least a few years. While still living in the wilderness, Hilda befriended the elf, Alfur. Thanks to him, she could sign the proper paperwork to finally see the Elves. In the animated series and novelization, Alfur went with Hilda when she moved to Trolberg so he could report on city life and continued to be of great help to her there. In the graphic novels, he stayed behind in the wilderness. Once in Trolberg, Hilda became friends with both David and Frida. Her friendship with the two is notably further fleshed out in the animated series and novelization than in the original graphic novels, where they were only minor characters. Just like Frida, she looks out for David and tries to help him overcome his fears. In Season 2, she even becomes Frida's familiar when Frida begins to learn magic. She holds Erik Ahlberg in an extremely low regard for being an absolute glory hound, whose attempts to become as famous as his distant ancestor, Edmund Ahlberg, often endangered her, her friends, other humans and various creatures (although after the events of Hilda and the Mountain King, that may have changed, as she was able to let him see reason and prevent the Safety Patrol from making a deadly mistake (i.e. provoke Amma into standing up and destroying Trolberg).