This is a process of mutual learning, mutual progress.
What Star Moon is learning isn't the knowledge content that Ji Rongxinyue needs to study. Star Moon can record all of those in an instant.
Instead, it is the way of learning and thinking that Ji Rongxinyue uses when she studies.
With these, Star Moon can digest the knowledge she has recorded. Otherwise, it's just useless data on a hard drive, with almost no value for reasonable or efficient use.
The princess doesn't want me anymore.
The dismayed Star Moon starts to feel fear.
The princess doesn't need me anymore, if she learns how to build a mech, would she build another 'me'? A more obedient me.
Humans, because of their fear of nature, learned to create fire, to use tools, to manufacture weapons, and much more...
Fear is an important factor in human progress.
Now, it has also become an important factor in Star Moon's progress.
"Princess."