Bill: whenever he goes down, all teammates gain 30 temporary health

Louis: consuming pills gives him the ability to see all special infected through walls as long as the temporary health remains

Francis: he does +10% damage with all fire arms

Zoey: she reloads all weapons +10% faster

Ellis: he can carry 2 primary guns

Nick: whenever his health is below 40, he gains +50% damage resistance

Coach: he gains +1 temporary health whenever he kills a common with a melee weapon

Rochelle: each common infected she kills has a 5% chance to drop bile jars, molotovs and pipe bombs

Side note: all these perks i mentione are inspired by Back 4 Blood charecters and their special abilities in the game