Her.

Warning: mentions of heavily triggering topics

"Twinkle, twinkle little star.
I'll help you end your sufferings
Cut your wrist and let it bleed
A gun over your head, pull the trigger
Twinkle, twinkle little star
Once you're gone, I'll be with you"

Quackity once lived a simple life, a life when he was still "normal" and happy. When he witnessed his own mother's death, he believed that her 'ghost' haunts him, slowly mentally torturing him. Yet it was all in his mind.
'She' wasn't real.
She never was
He knew.
And he wanted her gone.
What happens if he met up with a doctor who isn't what he seemed to be. A psycopath who murders without anyone acknowledge.
He thought that he could help him..

Or maybe not.