At first there wasn't really any answer, but that was only because music was in Gobo's ears instead. As he so often was he was singing a song to himself, just enjoying the roam. While the situation in the tunnels under his non-Rock home turf was changing every day, and he had a great network of other friends as well, sometimes it just felt good to get out there and explore on his own, a holdover from when he used to do that even back at Fraggle Rock. So at the moment he was amusing himself going through the tunnels singing a couple songs, and if Della listened carefully she might hear the current one filtering up to her. And of course, this included a brief dance/shadowbox break, because if you're amusing yourself alone why not have fun with it?

It was only when he'd finished singing, though he continued humming the melody, that he heard a voice calling his name and he paused to look around. That came from the other Duckburg tunnel-? But it didn't sound like anyone he knew yet. Curious, he started down that way, shouting ahead of him so it would echo up.

"Yeah! Who's calling?"