Eliminated agents and their eliminated manifestations

[Konrad Klar]

Example: Stinker (a minion ally) is in play with one of your characters. So, neither you nor your opponent can play My
Precious (the hazard manifestation of Stinker) until Stinker is discarded. Similarly, if your opponent is playing a
Wizard, he may not play Gollum (the hero ally manifestation of Stinker). If your Stinker is eliminated, My Precious and
Gollum may never be played.

Only face-up agents are considered for uniqueness.

So if Stinker is eliminated My Precious may not be played even if (as face-down agent) he is not considered for uniqueness?
What if Herion is eliminated? May Herion be played by other player as face-down agent?

[Bandobras Took]

The rules specifically allow for it, so sure.

If the agent is revealed, I would treat it similarly to an agent having an illegal movement history when revealed -- immediate discard and all sites returned to the location deck, as having the agent face up would then violate uniqueness rules.