From the Dark Throne Page 17 (Patreon)

Cute page, very colorful and alive unlike Lord Rydor's castle woops.

These side characters are Valentine's family (mother and 2 younger sisters) and Derek's father. The rest of the characters that should be in there are either dead or never had a relationship with the protagonists to begin with. I guess the panels are pretty self-explanatory and you can get a bit of their personalities, jobs and relationships just looking at them, but if you have questions, I can always answer.

By the way, the sheep Val's petting is Almond, their favorite sheep :3