[Nanaki perks up when Ochako gets her updates, and his ears flick as he snorts distastefully.]

Leave it to prey to get worked up in the spring...

[But at least they know where he is? But he sounds like he won't go down easily... his tail twitches as anticipation for a hunt fills him.]

Let him try and get aggressive. I won't back down from a rowdy bunny.

[And as they near the cafe, Nanaki can definitely smell the scent they're after.]

It looks like your source is correct. He's in there.