D cye

I am playing Bleach Brave souls on pc. on one side i play on my steam account, and on other side my brother wants to play on his account emulated in bluestacks, but i cant do much as in multiplayer co-op matches only one of us can use either of the controller or the keyboard-mouse (as the matches are tough to play using auto) while other gets deselected and inactive windowed thus no progress being made on their side. i can already use my controller in the steam version of the game by assigning keyboard and mouse configurations to my controller keys. if there is any way to use my controller on one side in my steam version of the game while my brother plays his games on bluestacks using keyboard and mouse...PLEASE HELP!!!!!!!!!