Dragons are a special type of being in Rune Aria where they can be both a Raid Boss and a known NPC. As well as a few heroic humanoid NPCs that functioned as raid bosses in scenarios, but were also NPCs you could interact with. Granted canonically they could still die of old age so most of them are likely dead now- the Dragon’s live for thousands of years. Even if they die, they have ways of coming back. So, you could fight a dragon in a raid, and also find yourself getting a quest from one afterwards, or even prior. In which case you could end up with a unique scenario- getting called out personally by the dragon for not completing their quest and coming back with a bunch of people to kill them and calling off the quest making them fail it.

“Jean? Is that you Jean? IT IS! Jean! Didn’t I ask you to deal with those bandits in my old lair?! Instead you are here with these holigans?! JEAN! I really thought you were better than this! You won’t be getting any reward for that quest now after this betrayal. Also, my breath weapon just recharged- farewell Jean, I’m targeting you, traitor.”