This is great! Chain to the floor especially is under-used, glad to see it. And I love that expression on Mezz.
I will say that canonically, the towerfolk MOSTLY don't go to the Gutter, both because they think it's beneath them (literally and figuratively), and because they have...quite a bit to entertain them in their own little world. They're a very insular bunch. That said, it isn't unthinkable a few might venture to the Gutter occasionally, or send representatives, if for no other reason than that the "subjects" they had on hand were too damaged or...genetically compromised to be useful. Did you know IRL that most lab rats come from a very narrow genetic makeup, which potentially throws into question countless studies done on them, as their responses to various drugs might not be reflective of the species in general?
Regardless though, I give HUGE kudos to you for even bothering to read through all my goofy lore, let alone make a pic with it. Much appreciated. Do you have a Twitter/FA etc? Totally fine to "promote" here as long as you're doing it connected to fanart you did.
Also: "But this one wouldn't stop talking." Yeah. Yeah that's about right.