When the Mist starts to seep around him, Michael will begin to hold his breath, not knowing the nature of the Mist. His ears perk up as Nicholas begins to approach, pointing his drawn bow in the direction of the intruder. Once Nicholas begins to whisper, Michael relaxes. When Nicholas is finished whispering, Michael nods and whispers back, "Go get'em." He holds his arrow and blinks his eyes until the Mist clears for him. He then starts directing his golden shafted arrows for more meaningful targets, such as eyes, hearts, groins, or other soft and less armored locations on the bears. 
If and when the bears have been taken care of, he will keep an overwatch of the area, making sure that they are not further ambushed. Once everyone seems ready to vacate the building, he will bring up the rear after slinging his bow across his shoulders. The bow will disappear from sight once this happens.