She's systemically breaking him down not through deception and working behind the scenes (which was admittedly fun to observe as a reader) but by being honest and straightforward.
I may be originally team Himari, and (if we're being fully honest) it's only a competition between the two main...
The element of the S-class adventurers kinda makes this story predictable. I hope the author introduces some element to bypass the power scaling (besides young girls bewitching their beloved disciple)