"Wait/Idle"-command for nobles

So i get raided and command my people into the tower, but one is deep down in the mine and would never make it, but is safe there - now i have to micro him during the fight so that he stays there and doesnt get killed (yea, i couldve made a door to lock the mine... :D ). Can we get a wait/idle command for them?

Edit: Actually went better than expected, first he wanted to run out but the 2nd mine command i gave him laste the rest of the fight.