I lost five times doing this and now I know how.  You know the boss will
kick Michelle and she is about to fall.  Well, do the grab move towards
her and her health will go up.  But watch out for the boss he will kick
you and your health will be down a little.  Also, try to knock the boss
down then grab her.  And, when you are fighting the boss and if you know
how to counter keep on countering until Kit does his flying multiple
kick move.  It will knock down the boss.