In auto-battle, mercenaries choose targets and act according to their class. They gain energy by acting and taking hits, then use their special skills; you prepare the fight through party selection and equipment.
Press "Start Battle" in "Tower" to watch the fight. Choose a playback speed with "Battle speed" or use "Skip" to see the result.
Watch who falls first and who receives healing while testing a new party. Use the result to review formation or equipment before the next attempt.