Thank you! :D Glad you enjoyed the demo so much!
To get the 1st to help you, you need bring his Light & Wood magic to 30+ and his affection up. The safest way to ensure his affection is high enough is to interact with him during the Intro choice (where you choose who to interact with). Then pass the Charisma (20+) check in Week 7 and also finish the mission "Heavenly Beauty"! :D