So, it turns out that even if you don't know what a person's actual name is, you can assign nicknames on your reticule. So, in this case, if a kobold has an ultraviolet marking...
I'm pretty sure I've explained that. Okay, think of color as a particular stretching of light. On one end of the visible spectrum are bands that are warmer but less stretched. These are sometimes called thermal or heat bands, or infrared. <1>
On the other end is the ultraviolet type of colors, which are the ones that look black to normal vision. For the most part, kobolds are without markings, but when they have them, they are in the ultraviolet range, which kobolds can see. A quick evolution from kobold eyes, and I could also tell who was whom, whether they were cooperating with names or not.
Okay, so one of the chapters got caught in the drafts and wasn't published in the proper order. I'll fix that eventually, but it's a work day. Plus, I've fixed worse, even with the primitive toolset Webnovel/Inkstone provides us.
I know what to do and how to do it, I'm just being lazy.
About half a chapter's worth of details were skipped here; it turns out I like the concise description better. And, without spoilers, I hope everyone remembers goblin tunnel tactics. It's about to become relevant again.
Thank you for your continued readership; more than anything else, it has seen me through two weeks of fatigue. Nothing compared to what other people have experienced, I know. But thank you, for helping me get through that.