Go into your menu, then go to equip, select who you want to equip and scroll down to charm and remove the token. Now you will be able to control your character during battle! Same goes for 3rd form idlemon.
Tips for new players: after pick monster click gate higher than this guy who give you monster pick lvl 1, 1 attempt fight. After this fight go to wizard girl on left and get bat orbs and gold. Go rest in inn. Repeat. After you get 10 Bat Orbs exchange it next to inn on bat summon. Summon bat and go fight more. After 10, 25, 50 etc killed bats go to soldier on left down and claim exp for you and monsters.
Go into your menu, then go to equip, select who you want to equip and scroll down to charm and remove the token. Now you will be able to control your character during battle! Same goes for 3rd form idlemon.