I hate to be the one who says it, but I didn't buy the boss's daughter's arc at all. It felt like a checklist of spoiled-rich-girl-tamed-by-love clichés. She starts as this untouchable ice princess in her designer outfits, throwing her weight around the company. Then, of course, the protagonist barges in, calls her out, and suddenly she's questioning her whole life? Her 'development' just seems to be her learning to be nicer to the main character specifically, while still being a nightmare to everyone else.
They try to give her a sad backstory about pressure from her dad, but it's rushed and feels like a lazy excuse for her earlier behavior. She doesn't really change her worldview; she just transfers her loyalty from her father's corporation to the male lead. The 'independent businesswoman' angle they push later rings hollow because her success is still completely tied to the protagonist's help and her family's resources. It's less character growth and more a personality transplant to make her a suitable love interest.
I kept waiting for a moment where she'd genuinely clash with the protagonist on a moral level or have to make a real sacrifice, but she never does. Her entire purpose seems to be to validate the hero by falling for him. The final scene where she stands up to her dad was supposed to be triumphant, but all I could think was, 'Wow, took you long enough.' A missed opportunity for a genuinely complex foil.