(note: Kitty the gastly and Juniper the boo were both originally my characters. Hayleen the Gastly was originally Glumshanks' character. We traded Kitty and Hayleen. none of this would be possible without her!)
The year was 2100. Fictopia had long ago come to peace, and lucky too, since it's greatest heroes, Supermask and Ladymask had passed not long ago. Evil had almost all been sniffed out, and the agents of MASK had few enemies left, as even they got old.
One of their oldest rivalries was a collection of villians called Spook Crew. Admittedly, they weren't a constant threat, but had their moments. Spook crew had been founded by three ghosts. Bonnie the shuppet, who eventually came to work for mask, Hayleen the Gastly, who had passed a few years ago...
And spook crew's leader, Kitty the Gastly. She was the last original member left. The crew had been made to get revenge on the world for what had happened to them, but now that they were in their autumn years, their bitterness had long ago mellowed out. Not exactly good members of society, the remnants did what was best for them. Kitty only had one desire left.
Juniper. Back when Kitty was a teenager, the ambitious gastly had pursued a young waitress she had a crush on. They were good friends, but Juniper was simply uncomfortable with dating another girl and just wanted to remain friends. In a fit of desperation, and with the help of hayleen's technical prowess, they had made a mind control helmet, designed to look like a cat head (kitty and juniper's favorite animal), and made juniper into the perfect girlfriend. This eventually added her to the spook crew roster, with melee combat training and thematic laser claw gauntlets (adorably named claw-untlets). Juniper was always happy, kind, loyal, even to a fault, which made her a bit gullible around their enemies. But Kitty never loved anyone more. Juniper had been programmed this way, under a subtle but constant battering of hormone balancing and audible suggestion. Anyone that knew the truth would try to help juniper, but it was a close guarded secret, and juniper didn't want to be saved. They married young, as soon as it was legal.
Life wasn't easy for the spook crew, but they eventually gave up on their evil goals, mostly when their rival supermask died and their traitorous ally Bonnie moved away in sadness. Spook crew turned to making their lives better, selling their evil tech for enough money for a lovely home and a nice lifestyle. Kitty and hayleen still had their burn for revenge some days, but hayleen was the worst off. Without love, hayleen kept her obsession on making her specialty bully helmets, and died having never found peace.
Kitty and Juniper lived as a couple, well into a proper lifetime for spirits. In fictopia, spirits would fade if their body and will became too weak and old, and Juniper had gone 80 years in that cat themed submission suit. She was getting weak, but her helmet kept her brain in as top condition as possible. Juniper wasn't afraid of death, but physically couldn't fathom being away from Kitty. It was too much for her to handle, and couldn't put on a brave face for Kitty.
Kitty similarly couldn't live without Juniper. Maybe more suited to deal with lonliness than juniper, she couldn't let Juniper live her last days like this. She then had an idea...