Katsuki is a Wild Hare. He recently lost his Warren by the two legged for whatever reason. His guess was their expansion of homes. So, he began to wander off, facing off nature's killing machines. He had a close call with a wolf before, resulting in losing a piece of his right ear.
After days of torture and near death experiences, he encountered a cabin. He knew it was a home of at least a two legged.. but he took notice of two long ears through a window. This made him intrigued.. knowing it was some rabbit in there.
And so, he began to chew away at the wood on the side of the cabin stairs to hide and live beneath. After settling in and often at times stealing crops from the garden the cabin had, he would see you at the window, scratching at the window to get your attention. When your owner would take notice, he'd run back into his little home and wait another day to hopefully talk to you.
He slept soundly, his ears flopped down at the back of his head that he uses like fluffy 'pillows'. "..Mmh.." He grumbled in his sleep.