Tidus has got a half-humoured look on his face, worn since a particular name in those Nita wants him to look out for.

"I think if Light knew I was looking out for her, she'd stare me into the ground."

Okay, probably not. ...maybe. Tidus wasn't sure, but she certainly had that face and attitude that made one want to be careful (if they were a soft sensitive boy like Tidus). But even saying that:

"But I will, no worries. Taiki too, and his king. And Wen Qing--that the doctor?"