First, welcome Heidi, nice to get a new tribemember over here.
Lesser known characters it is.
Hmm I think the definition will be difficult but I think named characters like Vok, Murda, Zey, Yurek (Savah's lifemate and great-, great-, great- greatgrandfather of Ahdri), Minyah, Vuurdah, Marleen, Thiro, Serrin, Bowki, the Rootless Ones, most Wavedancers, Harotim and other new High Ones, most preservers, most Trolls, most Wolves, chiefs and tribemates before Bearclaw etc. are no problem. In my opinion characters like Rillfisher, Bethia, Woodlock's family (but not Mender), Vaya, are also okay by me because their role was small in all the storylines.
The Rebels? They are maincharacters in that storyline but in the greater good of ElfQuest they are very small and lesser known (especially compared to Jink).
To solve the problem of main charaters combined with lesser known characters, maybe we can solve that by placing the maincharacters in their younger years. F.e. Thiro with a very young Leetah (f.e. in the background) in a scene that makes clear what there role/interaction is.
Hope my opinion helps settle the guidelines.