He did. Care. A lot. And it embarrassed him that Kairi knew that and had told Sora. So he did as he always did, and made fun of Sora.
"Also because its really easy," Riku pointed out. "You just existing is like a walking punch line. If I just wait long enough, there is always something to make fun of. And if not, well, your hair is an easy default."
Kairi shook her head. Oh Riku.
"We should come over at least three times a week to use Riku's pool," Kairi said, nudging Sora fondly. "It'll make sure he socializes this summer."