1st Edition - Hidden status / Unseen Asailant

[Raga]

Model who charged from Hidden Status/Unseen Asailant cannot be interrupted and countercharged.
I understand it as if the model cannot be stopped from inflicting the wound to the opponent.
According to the rules if the model survives the charge and has a Wait marker, it MUST use its Wait action and strike back.

I would like to know if the situation below is correct:
My opponent places a Tree Devil on the table and wants to attack my Wyrd who has a Wait marker.
There is also a Monarh within 4 inches who also has a Wait marker.
Tree Devil charges the Wyrd (I declare reaction to this action) and inflicts a Wound.
I must use Wyrd's spare and strike the Devil Back.
I would also like to use Monarh's spare action to charge the Tree Devil before he uses his second action - is it possible?
(If the Wyrd could react before Devil's second Action, I assume that Monarh can do the same - am I correct?)

[Raga]

Again I try reply myslef to my question.

If there is an action that requires a die roll, you can react to it but only if the action is resolved.
If the charge action is declared only countercharge may interrupt it. Hidden status or Unseen Asailant prevents countercharging so:
Every waiting model may react to an action made from hidden status or Unseen Asailant but only after the action is resolved.
(Shooting to the model who shot from hidden status is a normal thing)