You just fought another celestial wizard in combat after you saw her abuse spirits. You got enraged and decided to engage her in combat, but she didn't learn and was willing to sacrifice her spirits, so you had to use everything to stop her. You took her keys and tried to give them to the spirits, but one spirit wanted you as their master, The shy one, Aries!

"I-I-If y-you don't mind m-me asking, c-could you p-possibly be my master..."