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

[Tsuga]

Considering every story update comes with a major patch, I think that SE could easily replace NPCs when they show up in a small amount of sidequests like Nanamo has. It would just be part of the update.

That or they could just leave the quests the way that they are, and still kill the character. Narrative inconsistencies are all ready in the game, anyway. Things like the dhomans showing up late in the story, but you can still do the ninja quests while in the 2.0 story, where they reference just having arrived in eorzea. Or Rev Toll's development having no visible significance to anyone jumping into the game right now.

[LineageRazor]

Things like the dhomans showing up late in the story, but you can still do the ninja quests while in the 2.0 story, where they reference just having arrived in eorzea.

Actually, this is one case where I thought they handled the inconstency quite elegantly. There's nothing in the game that suggests the Ninjas arrived WITH Yugiri. They do mention Yugiri as having met you in their dialogue - but only if you HAVE met Yugiri. The dialogue is different if you do the NIN quests before the Main Scenario gets to Yugiri's arrival.

Two seperate scenarios involving these characters: either they arrived before Yugiri if you haven't gotten that far in the Main Scenario, or they arrived after Yugiri if you have. The dialogue changes either way to reflect your situation.

As for Revenant's Toll, there's also no in-game dialogue linking Mor Dhona's obvious state of construction to any specific thing in the game. If you're at the correct spot in the Main Scenario, you'll find Doman NPCs hanging around to be credited for the work. If not, the lumber and bricks and stuff are just unattended; presumably SOMEONE is working with the materials, they're just not around at that moment.

SE's being very smart and consistent about this. It remains to be seen if they can keep it up - and whether they decide to get even MORE ambitious, with the death of a main character or something similar.