The Oni screamed in horror and terror when he returned to Hell. In place of demons, devils, and other such things... were cute little sapient stuffed animals of every sort with no sexual drives or even any idea of what sex was, and were scientifically incapable of it anyway.
It would be later determined that the new state of Earth had resulted in a karmic imbalance in creation, and something had to give. It would also be determined that small minded and petty souls in the 21st century for some odd reason often declared such innocent and adorable things to be 'Hell'. And it was eventually determined that this 'modernization' was perfect for tormenting the sort of vile souls that were dumped into the pretentious self-important trash bin that was Hell.
As for the poor Oni who came home to this... he did the intelligent thing and tried to flee... only to find his escape path had simply ceased to exist.
He saw one selfish soul screaming, "Where are the horny succubi?!"
Only for a cute little teddy bear name Suzie to play a trumpet ... the damned soul screamed in agony...
Oni struggled to retain himself, but not when it was ALL EXISTENCE quietly saying "No, too bad for you." 'I must remember sax... no, saxophone? Zulu? Zebra? Xerox? Xylophone? OF COURSE! I love to play the xylophone!" The new plush fox declared proudly, and began to play the xylophone right in front of him.
Blood thirsty tyrants who had brought death and destruction on countless worlds snarled and hissed, the happiness and joy they saw everywhere far worse torment than what had come before.
A happy sun shined in the sky. Trees and flowers danced. Plush animals held parade with their cute little instruments, simple but pleasant melodies hung in the air.