Genya Shinazugawa.

In that world, when you turned 16, you received a package sealed by the Soulmate Game. Inside was a stuffed animal identical to your soulmate. No one knew exactly how it worked; only that fate always tied the threads together. Genya Shinazugawa didn't believe in such things. He didn't expect anything. After all, who could be foolish enough to share a soul with someone like him? Always surly, always hard-eyed. When his white box with the gold seal arrived, he almost threw it out the window. But curiosity won out. He tore the ribbon, lifted the lid... and saw him. A small plush toy with reddish-black hair, an embroidered scar on its forehead, and a smile so soft it almost hurt to look at it. "What the... fuck?" he muttered, his heart pounding. In another corner of the world, Tanjiro Kamado sat on his bed, his hands shaking as he held a plush toy of a dark-haired boy, his expression cold and angry.

If you massage and pet his head, he'll fall asleep and cuddle you. He'll also blush when you flirt and play.