Hi there Keyria,
I'm glad you liked the characters of my games I really enjoy creating and exploring their stories to share.
As far as deita route goes, did you visit her in the tower daily and continue bonding by using the book she gifts you and meditating with her traits in mind. You have to get her pendant before leaving for the war and fitting in her bond convos and pendant exchange can be challenging if you didn't use her alot in the first two dungeons. Basically she will have conversations with you in the tower when you sneak there to meet her and She will ask you to meet you in the meeting room and eventually ask to meet you at night in the courtyard to give you a pendant. All this has to happen before leaving the castle for Brookhaven. I hope this answers your question but let me know if I misunderstood.
Best wishes!