How did this character die?

Just finished the last boss fight but don't feel this question got answered at all.

It is about Faye

Speculuation: I'm left with with what I know, I would assume she should be reasonably healthy/fit and athletic (Kratos thought she fought beautifully, she was a former owner of heavy leviathan axe).

Solution 1:

We don't get any information in game about the cause of death, because Kratos doesn't like talking about it.

But considering his lack of anger at someone/thing, I guess she died of an illness.

It is also a possibility she killed herself, so that Kratos and Atreus would begin their journey.