I been wondering: do our Ninjas power increase each time you use them in battle? Because when I was using Fire Main, Naruto, Sasuke, and Hinata; each time I switch Hinata for Sakura, my power dropped even though they are both caught up. But now, after I used Sakura to win some battles, my power drops when I switch back to Hinata. So do ninjas power increase the more you use them or no?