I don’t understand how to make a character the leader, sometimes it’s just either Piper Gwynn or Zuzu and then it’s hard for me to get the scene because I don’t understand how that game mechanic works.
In the second map if you finish scouting the rival while your companion is adjacent, your companion gets taken. In all other cases, Piper gets taken. If you didn't scout the rival, both Piper and his companion will appear in the third map.