Bill woke with a start like he had done several times a night ever since he had rescued his younger twin brother Will from the opposite dimension to Gravity Falls where he lived, Reverse Falls.
Bill held still, simply enjoying the warmth of the blue demon snuggled in his arms and listening to his breathing.
Bill worked hard to ensure Will had no nightmares, so that's not what woke him.
No, what woke him was the same as always: the fear that Will would shift during his sleep and he wouldn't wake up in time to snatch him back before he was hurt again.
There were two soft spots in Bill's hard black heart; one was Will, the other was his beloved Dipper, who was pretty happy since Will was rescued.
Bill felt a pang of loneliness as he thought of Dipper Pines, his sweet pine tree.
He had not heard Dipper call him cheese crackers or even simply cheese for so long.
Bill had his hands full with his traumatized brother, and didn't have as much time to go and bother his reluctant boyfriend.
Dipper loved him too, Bill knew, but acted like it was torture to show it.
Bill had to sleep with Will, as the poor thing couldn't stand to be alone for very long.
His twin never asked for anything, but Bill could tell when he was getting upset anyway.
The first night Bill had stupidly put Will into his own room and closed the door.
He reopened it in minutes because Will was curled up sobbing.
So he tried leaving the door open, the lights on, then in the same room as he slept in, then finally just took him into bed with him, and that finally calmed him down.
However, Bill was unable to roam in Dipper's dreams anymore because Will needed him to drive away the nightmares he had constantly.
One time Bill had tried to leave Will so he could spend a night with Dipper, and of course Will just nodded, his blue eye wide as he watched Bill leave the room, but the yellow demon had hardly left the house when he felt the sudden fear that Will could shift again.
He had rushed back in only to see the beginnings of blue mist swirling around his little brother, and Bill saw felt real fear for the first time in his long, never ending life.
He had left Reverse Falls so fast he had never got the book with the enchantment that would bring Will back.
He had tried to look for it, but Will was screaming, and he had left as fast as he could to calm him down.
The poor thing had screamed a lot the first few weeks, but he rarely screamed until he almost was dragged back.
Bill had thrown all his power and blocked it, but he could feel the magic on the other side was stronger then when he had left the other dimension.
The infernal twins and their ghastly uncle must be practicing so Bill would be helpless against them if they managed to take Will again.
Bill hardly left Will's side after that, forever afraid that the Reverse humans would steal his twin away again.
Bill tried to take Will with him to see Dipper, but Will panicked when he saw the 19-year-old boy.
Dipper had been hurt by Will's fear of him at first until Bill managed to explain why, since Reverse Dipper looked just like him other then clothing, and Dipper had then understood.
Will tried not to panic, since his knew this was not the same Dipper, and this Dipper showed him every kindness, but he couldn't control his shaking, whimpering, and tears despite his best efforts, and Bill had given up.
Ever since, Bill never got much sleep, waking every half hour or so to ensure Will was still with him.
Every chance he got, Bill would patently teach Will how to use his long-dormant powers, and strengthen his own in any way he could.
Bill though was already at the height of his own power, and though he could strengthen it, it was not all that much.
To really get a boost, he would need to suck Will's power, be in pain, or be causing pain.
Bill's power fed off those last two things, and because they were both demons, it was obvious they could share power.
Bill gave some of his to Will when they had escaped, and now he had to teach him to use it.
It was frustrating; Will actually liked humans, preferred cooking, baking, and cleaning to destruction and death, hated causing pain, and liked to read a good book to stealing into someone's mind and causing havoc there.
The only humans he wished to harm, or rather, kill, were Reverse Dipper and Reverse Mabel.
Warning bells had gone off in Bill's head when he had omitted Reverse Stanford from that.
When Bill asked him, Will had teared up again, and Bill hastily changed the subject.
Ever since, he would causally mention Stanford, or let Will see his Stanford, and it confirmed his suspicions.
Will had a crush on the magician uncle of Reverse Falls.
Bill knew that he'd have to kill him himself if it ever came down to it, and never let Will know it was him or his twin may never forgive him.
Bill was pretty sure that Reverse Dipper was rather fond of Will too, in a sick sort of way.
The rage and panic on his face when Bill had rescued Will was all too plain to the demon.
"Well, too bad." He muttered as Will whimpered in his sleep. "You should have taken better care of him."
Bill was not sure why Will still whimpered even when he didn't have nightmares.
However, there was little he could do about it, so he jus let himself drift back to a light sleep, hoping that maybe the Reverse humans wouldn't try again, but knowing it was a futile hope.
Before he completely fell asleep, Bill had a brainwave: why not just go back on his own and steal the book?
Then he could rest easy knowing Will was safe forever once he destroyed any way for him to be shifted back.