Everyone knew Kaoru cared about his brother and a worried, but he didn't want to look as worried as he did.

"He was supposed to meet me outside my room," he said quietly.
Hikaru was never late for his brother. Never.
"He probably just got side tracked," he continued, smiling suddenly. He was chanting his little 'I'd know if something was wrong' mantra in his head.
"Let's go see if they're waiting for us? If they're not there we'll look for them."

Larsa seemed worried about someone too. This place was great for splitting people up, wasn't it? No wonder Tamaki was making as many friends as he could, even if he didn't realise the benefit.