The assumption wouldn't be entirely off base. She definitely hadn't meant for it to sound quite like that; she's grateful though that it appeared to have gone over his head.

She'd expected little else once she matched pace. While the little spurt of conversation is pleasant, the quiet is equally welcome. It's comfortable with Kisame that silences with others isn't. That underlying layer of tension obviously missing as they speed along toward their destination. It's probably ironic that she can find it easy to relax with a shinobi such as he.

Still Rui smiles when he checks on her. She might have less stamina, but she was fine. Starting to feel those first signs of protest from her body at taking such a pace but she'd be fine a bit longer before she would inevitably need to slow down. She'd apparently misjudged just the slightest bit his exact pace. Still it's clear she means to tell him she's fine. Nothing to worry about yet.