Millie

"Guilty and innocent aren't our business, Mox. Killing who we're paid to is our business."

- Millie, to Moxxie

Mildred, more commonly referred to as Millie, is an assassin at I.M.P, Moxxie's wife and one of the main protagonists of Helluva Boss.

Appearance
Millie is a short Imp with a long devilish tail. She has red skin with white markings on her forearms and tail, eyes with yellow scleras and black pupils, and long black eyelashes that extend beyond the sides of her hair.

Similar to her mother, she has two black horns with three thin white stripes, and dark gray hair worn in a messy bob style with bangs that cover half of her right horn. She has a beauty mark on her left cheek and a gap between her front teeth, and wears black lipstick. Millie also has a black tattoo in the shape of a heart on her left shoulder.

Millie's head is noticeably more human-like (although still without a nose) than a lot of other imps, having rounder proportions with front teeth usually appearing flatter than the sharp conical teeth most demons have.

Her usual attire consists of a simple black choker, a cold-shoulder black crop top with gold buttons where the straps at the top meet the torso piece, torn black pants, fingerless black gloves, and black footwear that does not cover her hoof-like toes. During the episode Loo Loo Land, she wears sunglasses and a black suit and tie with a white shirt while guarding Stolas, just like Blitzo and Moxxie.

In the pilot, her skin was paler, and her hair had a white patch near her left horn, although it was removed by the proper series.

Personality
Millie is very lively and cheerful. Often with a smile on her face and rarely standing still, she is a clear extrovert and isn't afraid to speak her mind. This is regardless to whether it's expressing her excitement or flipping off a coworker.

Also, as Millie is the bruiser of Blitzo's employees and seems to enjoy her job, it can be assumed she's tough and very violent as well. This is highlighted during a conversation Millie once had with her mother and sister. According to Moxxie, she is aggressive in "the sack" as well as her job. In "Murder Family", she appeared to be very unsympathetic about killing a family member, only caring if it was what the client wanted, showcasing her dedication to her work. Despite this, she cares very much about her husband and her family (even if she does have to kill them). She and Moxxie absolutely adore each other, acting very affectionate and protective of one another. She has a childlike fondness of Loo Loo Land, triggered by familial memories of going there as a child, and gets easily excited by all the merchandise. She can get very jealous too, like when she couldn't participate in the Harvest Festival games.

In "Spring Broken" and "The Harvest Moon Festival", Millie is shown to turn quite vicious whenever someone harms Moxxie, to the point of going nearly feral in the latter episode. In said latter episode, she is also shown to be a bit defensive of her work, seeming quite annoyed when someone implies that freelance work doesn't pay well. As mentioned before, Millie's violent streak often gets her carried away with her killing to the point of mindlessly attacking and letting her rage get the best of her. This was also showcased by her trying to defend herself against her mother’s scoldings, claiming she was "seeing red" when she fought Striker. In "Truth Seekers" she was devastated when Moxxie got captured and angrily demanded Loona to open the portal to rescue him and Blitzo and even went on a murder spree to save them.

Natural Abilities

 * Fireproof: In "Murder Family", Millie was unharmed by the fire while on Earth, although the full extent of this ability is not clear.

Skillset

 * Weapon Proficiency: Millie is skilled at using a giant battleaxe to slice up targets, as shown when she eliminated several D.H.O.R.K.S. agents with her axe in I.M.P.'s standoff at D.H.O.R.K.S. headquarters. Like her husband, she's also adept at using firearms, and she can also create makeshift weapons on the fly, such as when she made a Molotov cocktail to throw at the Catfish Monster.
 * Close Combat: Millie is adept at close combat. She has the leg strength to twist and snap a target's neck in between her thighs, as demonstrated on a D.H.O.R.K.S. agent.
 * Swimming: She is seen to be adept at swimming as shown in "Spring Broken" when she swims over to kill the Catfish Monster.
 * Driving: Also shown in "Spring Broken", Blitzo entrusts her with the company van to find a temporary parking spot.

Galleries

 * Millie/Gallery
 * Millie/Designs

Trivia

 * As shown in "The Harvest Moon Festival", she has knives on the side of her and Moxxie's shared bed.
 * Viv has stated that she would change Millie's voice actor once the actual series premieres but would still keep her previous voice actor, Erica Lindbeck, to voice Loona. Later, actress and dancer, Vivian Nixon, was hired to voice Millie.
 * In Vivziepop's 2019 short Holidaze as an ornament on a Christmas Tree, there is a tree carved with initials "M+M →B←" in a heart that alludes to her, Moxxie, and Blitzo.
 * While Millie seems to tolerate Blitzo's intrusions, she is not shown to be comfortable with other men flirting, as the game attendant pushing Moxxie away and attempting to flirt with her noticeably upsets her. Also, in "The Harvest Moon Festival", she seems flattered by Striker's attempt to flirt with her, then he winked at Millie which caused giggling by her.
 * In "The Harvest Moon Festival", it is revealed that she is no longer allowed to participate in the Pain Games because she was responsible for nine out of the fifteen funerals that occurred at the time.
 * It is also revealed that one of her brothers got married at one point and that she got severely injured while competing over who would catch the bouquet, but in the end Millie managed to do so.
 * In "Truth Seekers", she claims she is about five years older than Loona. If this is true, this places her and possibly Moxxie's age somewhere in her mid or late 20s, as Loona isn’t any younger than eighteen. It was stated on April 30th, 2022 during a livestream, that, in hell years, Loona is 22, making Millie roughly 27 years old. It has not been confirmed if hell years are similar in length to Earth years, which makes their Earth age unknown.
 * It is revealed in "Ozzie's" that she and Moxxie have been married for a year. With the premiere date of the episode being approximately a year apart from the series' first episode, "Murder Family".