Do Outsiders age?

[Gwyrdallan]

Is there any official info on whether / how oputsiders age? I'm assuming that native outsiders do (probably at a reduced rate), but do actual outsiders such as demons age?

[HappyDaze]

There's at least one noble in Korvosa that stayed young for a few centuries. He was a devil.

[wraithstrike]

Gwyrdallan wrote:

Is there any official info on whether / how oputsiders age? I'm assuming that native outsiders do (probably at a reduced rate), but do actual outsiders such as demons age?

They are immortal and are assumed to stay the same until they get promoted or demoted, but even then they dont age. It makes them weaker or stronger.