[ What he's saying sounds so reasonable that Yuuri wants to latch onto it without a second thought. He's a detective, isn't he? It makes sense he'd know what he's talking about. She wants to be told that she's being silly and there's nothing to worry about.

And... when she thinks about it, she wonders if he's right. That girl -- Ayaka, hadn't that been her name? -- was cruel and petty. Vindictive. But there was an ice-cold practicality to her under all that scorn. She had wanted Yuuri and Miki alive. What good would it have done her to spill blood just as she'd gotten what she wanted?

Some of the tension seems to drain out of her and she relaxes a little in his arms. ]

... I... I think... if they'd wanted to get something from us... wouldn't killing someone who was with us... that'd just make us angrier, wouldn't it? Less likely to do what she wanted. B--but... if she had someone as... as a hostage, maybe...

[ See? Doesn't it sound so reasonable, and just a little less traumatizing like that? ]