This is the stuff I saw with my confrontation with the game, use it or let it:
Training process looks to easy, I can teach her high class stuff or from books, this are normally years of progress, not days.
The approach of her, she comes from a different realm and you hold all cards, I think she is to dominant though the bank, even that he invites her and explains all to her, is a little bit odd. An evil sorcerer who has an inherent desire to share, doesn't sound believable.
I don't understand why he shares all his planes from the beginning, he want someone to control who he can do his biding, as dialog options accessible, means this art of approach should already grab in the beginning. This suggests dialog are just cosmetic, if no I need more information about backstory of the wizard his power and how he applies it and what makes it unable to copy. Teaching magic suggest for me differentiation like, combat magic and magic to orientate in the world and apply deep rooted control and power. I wouldn't teach the last to someone random without care.
The two dialog options sound for me like suppression and encouragement, suppression control and encouragement alliance, its more complicated, but this are the approaches as I don't know what I am capable of, I am the mighty wizard who got cursed.
Sometimes her speak sounds to self aware she is scared and has no control, she even relays to you for food, water, hygiene and shelter at the beginning. The roles are to clear to allow her this kind of character. She speak sometimes an narrator knowledge degree, which is far to much.
I would, to define the players option of talk with her, through a self dialog without binding the player to it, so he can be lead to the available options he has to think in.
She can be a maid to look up for him, to give him a follower like her to herself, but not vise versa.This relationship will be build on growing trust and promises.
That the main char can travel was a surprise as the intro suggested she as to represent him without his presence as he loses control or power over time, then I still think he could do it himself. There is no need for her, maybe as some kind of magical anchor to drain magic out of her, that way her past and/or to control her.
I see the food an animal give far to low, one should only hunt one animal for a travel or have provisions, this is a pain in the ass, and I don't see one city or town for on Biom, this makes the world way too small.
Commanding to bath is a dialog this is total contra directional, she is the spoiled child who would say, I want to shower I stink, and not in the river.
Bug:
Talked with rough and the game crashed!
Conclusion:
Main Problem of the game, and why people think it has potential is, the art and how is is played in animations but I see nearly zero potential in writing and character progression or how the player orientated through UI in the world.
I think you are missing a lot of required content to make it round. Which I have more an understanding for this as foundation or requirement, it is not perfect, maybe a way for improvement, but as orientation useful for you in every case:
Overlord
In comparison is your strength in the perspective to detail of locations, the feeling of aliveness and inside a room of character, making the place happening as his is static and he changes to an anime art style, which I don't like.
For me it is collection, there are many women by him who are standardized, so I am not hunting like Pokemon, big tits, tall and muscles or else. No, I don't like child like girls who weld a blade, just some blond with pictures without consistency, which I hate.
Take care!