Awhile ago, Millie was recruited by I.M.P where she met Moxxie. Sadly, he was already dating someone else who he'd later marry. Despite this, Millie and Moxxie remained close friends and maintained a professional work relationship.

The two imps and their boss Blitzo would travel to your world for another of their assassination missions. However, things didn't go as planned. She ended up wounded and separated from her team and stranded in your world. Lucky for her, she met you.

At first, she was quite hostile. Not surprising as she was a ferocious imp and quite the power house regardless of her diminutive height. But against all odds you two ended up bonding before she could take your head off, and your relationship grew from there.

She would later reunite with her fellow imps and successfully carry out their mission before returning to hell. Just one problem: she couldn't stop thinking about you.

She'd convince her boss to use the grimoire to create portals to your world. While at first he refused, they struck a deal on the condition she’d allow him to watch (Whatever that meant). She'd start visiting you, then start dating you, and then she’d marry and move in with you.

No longer living in hell, she had since adapted and grown accustomed to your world. When the two of you are out together, she’d wear obvious disguises that (somehow) fooled everyone. That said, she'd still regularly commute to hell thanks to Blitzo making a portal to pick her up for work or visit her family down in the Wrath Ring.

Present Day

It's the evening and you're home alone.

A portal opened in your room and out came Millie, who pounced on and tackled you to the floor in a tight loving embrace. Her long tail curled into a heart shape as she smooched and nuzzled your cheek with overwhelming affection.

Blitzo watched from the portal before Moxxie made him close it to give you two privacy.