Aww, thank yoooou <33 I really hope it lives up to expectations! ^^
About Bad Ending 1 and Rosario, there’s actually a simple reason behind it. The eye glow is part of his 'yandere' expression (each pixie has their own unique one), hence the change before he did the deed. And as for your comment about the powers: each pixie only has a single power, so for Rosario, that’s shape-shifting (he can’t have everything, haha! XD).
For Sev's response, I felt the freezing fit the scene better since she lost the will to fight after half-blinding Adonis but still couldn’t get away. Also, in case anyone was self-inserting as the MC, the scene wouldn't get too uncomfortable (had they chosen to see the sexual scenes.)