*Spoiler* How to complete quest?

[EndlessDreams]

The following is a spoiler...










Anyone know if there is any way to complete a request that involves talking to a NPC that is no longer there? Like the quest involving talking to Ellis or whatever that Cadet name is.

[Hiccup]

Cedera takes over

[Okitaru]

Ceara*
You can turn in any quests to her after you finish all the funeral preperations.