Haruhi/Kaoru
The Twins: Part IV
Much like with Hikaru, Haruhi didn't think much more on Kaoru in the beginning either. After she caused their fight and the Fear Tournament things changed. Haruhi noticed how much the brothers looked out for each other. She noticed how Kaoru was the calmer one when dealing with various situations, while Hikaru was a slightly more temperamental.
Kaoru began paying more attention to Haruhi after he realized she could tell the two apart….successfully. It shocked Kaoru. After all, no one had been able to tell them apart aside from that one girl when they were young. And they had lied to her, saying she was wrong, and she apologized for mixing the two up.
Kaoru found the girl with her commoner beliefs to be fascinating. What they considered to be a blow up boat, she considered to be a pool. The difference between the two worlds was great, yet Haruhi was doing great in high society. There were many traits that surprised Kaoru about the girl.
Her defensiveness towards the boy, Arai-kun, which led her to slapping his twin. Haruhi was surprisingly strong, but maybe that was just because she was a commoner. She was smart and had a lot of common sense which impressed Kaoru. He was impressed with the way she handled them.
Haruhi was new. She didn't let them talk down about her. She didn't fall for their 'boy love'. She didn't play into their games. Normally. They had tricked her that one time. She hadn't appreciated it. Kaoru was interested in Haruhi, and he didn't know when he'd get bored of it, unlike all his other playthings. But Haruhi wouldn't even allow herself to become one of the twins' playthings. Yes, Haruhi definitely interested Kaoru.