When you're not engaged in battle, it's possible to heal characters using CP instead of items. First, you must have healing Artes unlocked for a character. 1. Go to the Menu and choose Artes. 2. Switch to the character that has healing Artes and select it (e.g. Shionne, First Aid). 3. Press the Apply button. 4. Choose which character to apply the healing Arte to and then press Apply.