Seras huffed at her Master, then hunched her shoulders a little when she noticed him staring at her. Her expression clearly translating to something along the lines of, what?

Didn't he realise how creepy it was when he did that? No, what was she thinking, of course he did, that was the point.

Even so Walter's sudden exclamation distracted her, red eyes widening a little. "Eh? What, Walter?" Then she realised, oh... she'd brought out the medkit just in case, then gotten distracted through talking to Integra.