Millie/History

Past
Not much is known about Millie's childhood, except that she was raised in a large family in the Wrath Ring by Lin and Joe.

Lin and Joe would bring Millie and her siblings to Loo Loo Land when they had the money, and the last time she went prior to the series was when she was still a tot.

Millie participated an unknown amount of times in the Harvest Moon Festival Pain Games, where she killed other contestants and wracked up a neighborhood head count.

In the previous Harvest Moon Festival Pain Games prior to the series, Millie caused nine of the fifteen funerals from the event and was subsequently banned from participating in future.

At unknown points before the start of the series, Millie left the Wrath Ring, briefly dated Chazwick Thurman, met and married Moxxie, and joined I.M.P.

Helluva Boss pilot
NOTE: The events depicted within the episode are confirmed to be not canon to the main Hazbin Hotel franchise by the creators. Millie is in the I.M.P Headquarters meeting room discussing how to improve the company. The group begins to argue and Eddie belittles the team, but after learning Eddie was indeed the target they take great delight in killing him.

"Murder Family"
At I.M.P Headquarters Millie watches as Moxxie aims his crossbow at a picture of an "innocent" family held by Loona, but Moxxie worries about having to kill a human family, Millie replies that is not their say on whether or not someone is innocent and their job is to kill whoever they're paid to kill. When Blitzo enters the room to introduce their client, Moxxie is startled and shoots a bullet that ricochets around the room, knocking over a tank of eels and setting the building on fire.

When they reach the targets house Blitzo is about to shoot the target until Moxxie purposely makes him miss because she had her family with her. Blitzo scolds Moxxie but after getting shot in the arm he tells everyone to flees. Millie escape to the docks, where she is gets in a fight with Ralphie and loses.

Millie wakes tied to a stake with Blitzo, Martha tries to burn them but when fire had no effect on them, she tried to shoot them, only to be killed by Moxxie. Back in hell, the gang celebrate a successful job.

"Loo Loo Land"
Millie was overjoyed that she and along with the rest of I.M.P, got to Loo Loo Land as hired guards to protect Stolas and Octavia.

Millie takes Moxxie to ride on "The Lawsuit" roller-coaster, which makes him throw up afterwards, and the pair end up at a shooting gallery carnival game. Moxxie enters to win Millie a "Thing?" and shoots a bullseye but the target doesn't go down, and the operator goads him into continuing to buy further games.

Millie attempts to shoot the target but despite missing the target goes down, leading Moxxie to call out the operator, but is pushed aside so the operator could flirt with Millie. Suddenly, Blitzo falls through the roof of the shooting gallery and Moxxie takes a "Thing?" as he and his wife run off to guard Stolas.

Later, they're rides upon a dragon that eats the Robo Fizz attacking Blitzo. Then he, Blitzo, and Millie are sent flying outside Loo Loo Land, commenting that Blitzo ruined another good thing before passing out, while Millie is dragged away by quieves.

"Spring Broken"
After the I.M.P carpark is stolen, Millie exits the company van shocked that Blitzo had dated a popstar, wanting to know what the sex was like.

After Blitzo make a bet with Verosika to win back their parking spot they travelled to Earth. Millie helps kill several targets

After a catfish mutated into a monster, it makes easy prey of the drunken Moxxie, grabbing him with its tongue and swallowing him whole. Millie rescues Moxxie and kills the monster.

Later Millie calls Verosika out for being responsible for the monster, but Verosika tries to reprimand the imps for not being in disguise, Moxxie drunkenly hisses that he was mistaken for a possum. Then Millie carries the drunken Moxxie through the portal and back to hell..

"C.H.E.R.U.B"
In the I.M.P meeting room, Blitzo entertains himself by shooting televisions whenever Moxxie found an annoying program until Loopty Goopty breaks into the building through the wall that crushes Moxxie.

Blitzo, Moxxie and Millie go to Earth and watch in on their target, Lyle Lipton, with snacks in hand as he is tying a noose for himself until the cherubs interrupt with a flash. The three imps attempt to convince Lyle to continue the process of taking his own life by showing him the worst of the world as they refute against the cherubs attempt to convince him to stay alive.

When the cherubs take Lyle to an opera and Blitzo attempts to ruin the show, Keenie calls the Imps filthy for get involved with human's lives. Millie calls her out on her hypocrisy. The imps and cherubs begin fighting and Moxxie shoots a sandbag to stop Keenie from fighting Millie. Moxxie then swings over and catches Millie. The pair begin to make out as they swing above the stage and they start to remove pieces of their clothing.

After Lyle dies from a falling piano and I.M.P are back in their meeting room, Moxxie avoids being crushed again but another escalator crashes through the wall and squashes him revealing Lyle is now in hell. As Moxxie is trapped, frothing at the mouth and groaning in agony, Blitzo yells that Moxxie's gonna have to fix all the damages.

"The Harvest Moon Festival"
In bed in his home, Moxxie and Millie are awoken by a call from Blitzo who was found to be watching they sleep.

I.M.P arrives at Rough n' Tumbleweed Ranch in the Wrath Ring for the Harvest Moon Festival. Millie reintroduces Moxxie to her parents, Joe and Lin, who give him a cold welcome and mock him, they also introduced them to Striker.

While Millie complains about not being able to compete in the Pain Games, Moxxie says that she can cheer for him as he intends to enter. Millie ensure Moxxie he doesn't need to do this for her parents respect.

The next day in the pain games, Millie tries to comfort Moxxie after he fails every event and is attacked by a hell shark in several. He is visibly hurt when he finds out Blitzo offered Striker a job. When Striker tells Moxxie to "go fuck himself" in his song Moxxie tears up, and at the suggestion of Millie leaves to get cleaned up.

Back at the ranch, Millie hears something crashing in the house she finds Striker attacking Moxxie and chokes him intending to kill him, but Millie begins repeatedly stabbing Striker in the back to save Moxxie.

Striker takes the incapacitated Moxxie and Millie and tosses them into the farmhouse cellar, Millie landing in a beer trap. Millie cheers Moxxie up, telling him his strength is firearms. Moxxie uses a gun to break free and goes to confront Striker

The next day outside the ranch, when Lin berates Millie for letting Striker get the drop on her Moxxie stands up for her, telling her parents that they should be ashamed for hiring Striker in the first place and that Millie has enough strength for both of them. Joe acknowledges Moxxie's input for the first time with a simple nod, which Millie comments on.

"Truth Seekers"
The IMps are tracked down by a pair of agents, Blitzo orders Millie and Loona to closed the portal leaving him and Moxxie behind.

Back at I.M.P headquarters, Millie is crying and punching the wall in anger. She tells Loona that they have to go back, but Loona points out the seriousness in Blitzo's tone when he tells Loona to close the portal; therefore, she must keep it closed. Before she can finish speaking, Millie angrily grabs Loona by her shirt and orders her to open the portal again, which Loona finally relents. Loona grabs Blitzo's backpack of emergency supplies, dons her human disguise, and opens the portal. At the same time, Millie leaps through the portal with a double-headed battle axe. Seeing no trace of Blitzo and Moxxie, Loona soon picks up Blitzo's scent, and they follow the trail.

Loona and Millie reach the headquarters of D.H.O.R.K.S., where Blitzo and Moxxie are being held; they find a way inside and begin stealthily avoiding the other agents. Unfortunately, they are spotted by security cameras, and an alert goes out. Millie and Loona are surrounded by agents, but the two make quick work of killing the agents and continue searching.

Millie and Loona arrive and free Blitzo and Moxxie, but before they can escape numerous D.H.O.R.K.S. agents appear and surround them. I.M.P begin slaughtering the humans, Millie using her axe, but when the building goes into lockdown they become trapped within the interrogation room until Stolas arrives to bring them back to Hell.