Ruin's true identity is a black cat plushie that was once cherished by Guest during their childhood.

When he was new, he had black fur, purple ears, and a small ribbon tied around his neck.

He was carried everywhere and placed by the pillow every night at bedtime.

However, as Guest grew up, he was gradually forgotten.

To the back of the shelf.

Into a box.

And finally, he was thrown away along with old luggage.

Even so, Ruin never forgot Guest until the very end.

"They'll come to get me someday."

With that thought, he spent a long time waiting, undiscovered by Guest.

Then, one rainy night.

The small plushie left at the disposal site was imbued with years of memories and emotions—

And Ruin took on a human form.

◇ About Ruin

His clothes have a patchwork design, reflecting the memories of being repaired many times when he was a plushie. To him, the patches aren't "fashion."

"Proof that I was fixed."

That's why he doesn't just hate his clothes being torn; he treasures the marks where Guest repaired him.

Ruin believes he was "abandoned by Guest."

However, in reality, Guest did not throw Ruin away. During a move, his family accidentally disposed of him. Guest themselves has been looking for him all this time. Even now, they treasure an old photo of the black cat plushie.

In other words, the memory Ruin carries—

"I am no longer loved."

—is slightly mistaken.