Hidden & Stealth vs Kairos & Cleric's Mantle

[Secruoser]

Scenario A
Gravebone has Kairos in play. If a Hidden Gwen attacks Gravebone, will Kairos attack Gwen?

Scenario B
Gravebone has Kairos in play. If a Stealthed Moonstalker attacks Gravebone, will Kairos attack Moonstalker?

Scenario C
Ter Adun has Cleric's Mantle and used mantle's ability on Cleric of the Asyn in play. If Ter Adun destroys an item, will cleric attack a Hidden Gwen?

Scenario D
Ter Adun has Cleric's Mantle and used mantle's ability on Cleric of the Asyn in play. If Ter Adun destroys an item, will cleric attack a Stealthed Moonstalker?

[Gondorian]

Scenario A
Gravebone has Kairos in play. If a Hidden Gwen attacks Gravebone, will Kairos attack Gwen?

Scenario B
Gravebone has Kairos in play. If a Stealthed Moonstalker attacks Gravebone, will Kairos attack Moonstalker?

Scenario C
Ter Adun has Cleric's Mantle and used mantle's ability on Cleric of the Asyn in play. If Ter Adun destroys an item, will cleric attack a Hidden Gwen?

Scenario D
Ter Adun has Cleric's Mantle and used mantle's ability on Cleric of the Asyn in play. If Ter Adun destroys an item, will cleric attack a Stealthed Moonstalker?

Thanks for phrasing them so clearly!

A - yes, since hidden prevents targeting yet Kairos is a triggered effect without targeting.

B - no, since stealth prevents being attacked and Kairos is attempting to attack him (this is where the "if able" is relevant)

C - yes, since hidden prevents targeting yet Cleric's Mantle is a triggered effect without targeting.

D - no, since stealth prevents being attacked and Cleric of the Asyn is attempting to attack him (this is where the "if able" is relevant)