It's in volume 17, when the king dies. Just a worthless character mentioned a single time in the whole series. There are a lot of others like that, but for now I don't think they're worth adding. Maybe later, once the bigger stuff is down.
Oh, Yugo! How could I forget!
Unfortunately, I agree with Aaz on this. Yugo and the other ministers of Midland affairs are a little too inconsequential to include in the Glossary. Besides, I'm pretty sure I saw Yugo's disembodied head sucking the dick of a fountain in ep 232. It's not likely he'll play a role in the future

In the defense of other one-shot references in the Glossary, Randel, Nicce, Paneria etc. are all part of the Holy See Alliance, and may yet play a role on the front lines of Vritannis. They're also entire countries, playing an active role in current events.
Nice work, Walter. Was the old glossary static?
Yep, all hard-coded HTML. It, like the rest of the encyclopedia, was a pain to update. Now it's all PHP, and I can just add a new entry very easily.