K'os and Disodrer are formally introduced.
I'd like to claim I thought those names were original, but I don't. I don't now, and I didn't then. But those are their names.
These dragons are the only characters whose speech boxes don't have lines. This is because their voices aren't positional. They're talking directly into Beastling's head, here.
Characters offscreen will also occasionally not have lines, but that's just because there's no character visible to point to.