I do not own Gravity Falls.

He had promised to protect her.

He had promised to never let her get hurt, to never fail her.

He tried.

He truly did try, leaping towards where he saw her fall, reaching his hand out, desperately trying to grab her.

But her hand, her soft, delicate, perfect hand, slipped through his fingers, and he could only watch as she tumbled into the abyss.

He tried flying after her. But, no matter how fast he went, it seemed gravity was faster.

As he landed on the hard ground, his legs shook.

Laying there, empty of all life, was the broken and bloody body of his precious Shooting Star.

For a moment, all Bill could do was stare, wide eyed, at the destruction of his beloved one, unsure of how to deal with the massive flood of memories and emotions that were overtaking him.

Shakily, he took a step forward.

"Bill, do you know how many stars there are?"

"Of course I do, Shooting Star! I know everything!"

"Well, how many than?"

"...None as beautiful as my Shooting Star."

"You don't actually know, do you?"

"... I totally do I just wanted to be romantic, sheesh."

Focusing his gaze directly forward, he forced himself to bend down next to the body.

"Of course I'll marry you, you dumbo!" she laughed as she threw her arms around Bill.

"Ah, calling an almost-all knowing dream demon a dumbo. Brilliant idea, Shooting Star."

"Quit being obnoxious and hug me back, this is supposed to be a heartwarming scene."

"But of course, my little Star." As he wrapped his arms around her, he nuzzled in her soft brown curls, feeling more content then he ever had before.

Slowly, he lowered his eye, choking back a sob as he met the blood stained sweater, the perfect curls soaked in warm fluid, and the face he grew to love, to always seek out, blank, emotionless...

Empty.

Soon, he could no longer control himself, crying out, weeping..

Turning to angry screams, crying for revenge, as his fist clenched in fiery anger.

After what seemed like hours, but was only minutes, he scooped his love in his arms, standing, and looked back up at the top of the canyon from which she had fallen.

"You won't die in vain, my beloved," he whispered quietly. "... I'm sorry, Mabel, for you would probably not approve of what I am prepared to do."

As he used his magic to fly back to where they had been only minutes before, battling a particular "psychic" brat, his gaze was cold and hard.

And nothing would stop him from avenging his love.