[Your character might have noticed, or they might not have (either way, he certainly doesn't care), that Gokudera hasn't been blowing stuff up or shouting across the communicators as much as usual.
You might also notice that your communicator is broadcasting a very pleasant
song into the air nearby. Since finding Dante and Dean in the bar, Gokudera had happened upon the large piano in the bar. The teen is in silhouette as he looms over his communicator, playing with concentrated scowl pinching his brow. Other than that, he seems a bit distant and has no idea that he's being recorded.
Near the end of the song,
Uri hops onto the keys.]
Uri! Stop that! You can't play it doesn't even- Naa!!
[And she claws at his hand before hopping down onto the communicator. His glance at her turns to a look of stunned realization upon feeding the feed on.]
Shit-!
[And it's turned off.]