Are characters who appear in multiple separate questlines immune to being killed?

[Riepah]

Note that if we follow the logic that Nanamo is safe because she shows up in the Culinarian quests, it also means we won't be bringing Lolorito to justice any time soon. Bit of a double edged sword.

And why would you want to bring Lolorito to justice, pray tell? The evil Lalafell is Teledji Adeledji, in case you mixed them up.