i love when she changes dialects too. i wish more female leads were like her. strong resolve and able to deliver through in the end; strong in her own way and never appearing weak despite her significantly inferior physical abilities. people who are uselessly "brave" or "upright" are so boring. people who are "headstrong" and always brute force through situations so that it always goes their way are also boring. i love yoshino because she's not merely brave, upright, or headstrong. she has her own set of morals and is capable of demonstrating a sort of strength that i have yet to see in most other female leads. sure, she needs the strength of the guys around her most of the time, but she also has a strong resolve to adapt to the situation and doesn't uselessly fight against the guys that protect her because they don't see her, a woman, as an equal. yoshino sees beyond the immediate situation and has the ability to weigh her options with the intention to adapt and survive.
on another note, i genuinely believe miyama loves her, albeit in his own twisted way. he was raised to survive as yoshino was, but in a much more different way. additionally, he knows he has the power to play around with others, sexually and emotionally. yoshino is a special flower to him, but nevertheless a flower amongst many others. whether he truly pursues her or not, he's still figuring that out. independent of that, he refuses to violate and disrespect her sexually because she is more special than his fwb's. probably.