Loona/History

Past
Not much is known about Loona's history, but at some point before the start of the series, Loona was up for adoption at a Hellhound Adoption Foundation, where she lived like a prisoner and gave the employees a hard time until Blitzo adopted her a month before she turned eighteen. Despite being old enough to look after herself, Blitzo used to hire babysitters to look after Loona during his absence but the babysitter apparently didn't like Loona.

When Blitzo opened I.M.P, he hired Loona as the receptionist; due to her laid back and dismissive nature, it is presumed that Loona did not actively seek out the position and only took it due to Blitzo asking her to since he didn't want her in the field out of fear that she may be hurt or worse, despite the fact that Loona is capable of both using guns and fighting bare-handed.

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. To Be Added...

"Murder Family"
Loona is laying on a couch with a picture of an "innocent" family in her hands while Moxxie aims his crossbow to shoot it. She objects at Moxxie that the family is most likely evil, with Millie agreeing with her.

After Moxxie accidentally sets the room on fire, Blitzo hopes that the grimoire wasn't destroyed and Loona says that she got it, to which Blitzo says in a baby talk voice that she is his favorite and he offers her a treat. After Loona rejects the treat, Blitzo eats it himself, resulting in Loona yelling at him that he is gross.

Later, after the killing of Martha, Loona is at the party to celebrate Moxxie's success.

"Loo Loo Land"
Loona gets annoyed when Millie, Moxxie and Blitzo get excited about going to Loo Loo Land and shouts at them to "Shut the fuck up!".

"Spring Broken"
Loona sits in the I.M.P van while Blitzo talks to Verosika Mayday, and gets out after she leaves. Inside the I.M.P building Loona worries about how she looks and almost says "dad" after Blitzo compliments her, then accidentally bumps into Vortex and blushes at him.

In the I.M.P meeting room, after Blitzo explains their victory plan, Loona asks if she can join the imps on this job, but gets annoyed when she finds out that they hadn't been using human disguises this whole time.

On Earth Loona helps lure humans to inconspicuous locations where the imps would kill them. While helping at first, after a while Loona gets distracted by Vortex and went over to talk to him. While nervously talking to Vortex, Loona mentions not having friends before Blitzo interrupts and gets into an argument with her that ends with Blitzo leaving to go kill something.

Later Vortex offers to invite Loona to his girlfriend's parties sometime to help her make friends.

"C.H.E.R.U.B"
During a day where Blitzo was entertaining himself shooting televisions whenever Moxxie found an annoying program, Loona was sleeping in her chair when Loopty Goopty broke in to hire I.M.P to kill Lyle Lipton.

"The Harvest Moon Festival"
Loona goes with I.M.P to the Wrath Ring for the Harvest Moon Festival. When Millie introduces Loona to her parents as Blitzo's hellhound Loona declines giving them her name, saying they don't deserve to know it. She then videos Moxxie struggling to kill the hell hog.

Later, outside, whilst using her phone Loona hears Blitzo whistle out to her while he and Moxxie fight against Striker. Loona arrives just as Blitzo and Moxxie had Striker cornered and kicked door the bedroom open, slamming it into Moxxie, and accidentally giving Striker the opportunity to escape.

"Truth Seekers"
After Blitzo and Moxxie are captured by D.H.O.R.K.S., Loona and Millie return to the human world and sneak into the D.H.O.R.K.S. Facility to rescue them. After some time in the building the four demons find each other, but are surrounded by numerous D.H.O.R.K.S. agents, causing Loona and the other I.M.P members to slaughter almost every agent inside.

"Ozzie's"
Loona sat at her desk reading an "IMPGOSSIP" magazine and drinking a bottle of an unknown beverage, which when she places the bottle on the grimoire a spell activates and a portal opens, allowing Blitzo, Moxxie and Millie to return from killing a bunch of lumberjacks.

After Blitzo returns home from going to Ozzie's, he sees that Loona had left him a note saying she was going to a party with Tex and she would be back late.

"Queen Bee"
Sitting in a car outside Beelzebub's mansion, Loona rejects a call from Blitzo. After leaving the car Loona texts Vortex and meets up with him and they enter the party together.

Inside the mansion Loona attempts to make friends with a hellhound named Vikki, but the conversation ends up getting heated and Loona yells at Vikki that she was a "massive bitch", making all other partygoers gasp and go silent.

After Vortex brings Loona a cup of Beelzejuice the two watch a performance by the Queen of Gluttony, Beelzebub, but Loona doesn't enjoy the performance and stands looking awkward the whole song. After the performance Vortex introduces Beelzebub to Loona as his girlfriend, making Loona feel bad.

After Beelzebub left the conversation Loona decides to leave and walks out of the building crying and calls Blitzo to pick her up, and which he promptly arrives to do. While in the I.M.P van ready to go home a tall handsome hellhound hits on Loona causing her to change her mind and convince Blitzo to stay at the party together.

Back in the party Loona cheers on Blitzo, even calling him "dad", as he competes against Beelzebub in a drinking contest. Now enjoying her time she begins to enjoy herself and makes some friends, but is interrupted by Beelzebub who is worried about Blitzo's mental state. Loona confronts Beelzebub, but concedes and goes to check on Blitzo.

Loona finds Blitzo making out with a random imp and stops him from continuing his drunken encounters, then she takes Blitzo home and comforts him when he believes he is going die alone.

"Seeing Stars"
Loona is attacking Blitzo after he talked to her about her attitude with clients, but she stops after he threatens to replace her and angrily walks off to her desk after he told her to do so. At her desk Loona spots Octavia sneaking in, but doesn't react to her, instead continues to use her phone and only announced that they had a visitor after Blitzo called out to her because of the visitor.

Later, Loona smells where Octavia went, leading I.M.P and Stolas to Los Angeles where they go in search of Octavia. Loona is split off from the others and searches across LA alone, following Octavia's trail through her Sinstagram photos.

That night Loona found a crying Octavia at an observatory where she comforted Octavia about issues with her father. Loona and Octavia soon find their fathers and Loona kicks Blitzo in the balls before the demons watch fireworks exploding in the sky.

"Exes and Oohs"
Loona sits in the I.M.P office looking at her phone while the others leave in a helicopter. The next day Loona is sitting in the same spot and still using her phone, but makes an angry shrug when she sees the imps return.

"Western Energy"
Blitzo takes Loona to St. An's Hospital to get her yearly Hellbies shot that she's not had for five years due to being difficult to book. At the hospital Loona is terrified and hides underneath some chairs where Blitzo tries to comfort her.

In the doctors office Loona sees the large needle and attacks the doctor to avoid it, requiring Blitzo to protect him from her. After some scuffle Blitzo manages to pin Loona down and the doctor manages to administer the shot, causing her to howl in pain

Once the appointment is over, Loona stumbles into the I.M.P van with a dog cone around her neck as Millie and Moxxie arrived with an unconscious Stolas.

"Unhappy Campers"
After Moxxie, Millie and Blitzo return from Earth and watch the news, Loona is in the meeting room sleeping with drool on the table.