@toratsubasa Mero from Monster Musume saw no problem with eating fish. There was a mermaid princess in Elf Life (no longer online) who has rather voracious about eating sea life.
@Aichan: Several VNs I've played (Never 7, Ever 17, Virtue's Last Reward) only offer some choices after you've gotten a certain set of the previously available endings.
@Mah_Buddy_Keith
Years before encountering Sirius, original Katarina did things like insist Gerald stay engaged to her while her forehead was scarred, and treat Keith like garbage.
I've only read the pre-serialization version, but there is a spot where Yoko gets winded just trying to keep up with the song and dance of the fellow idols, and takes up running.
Also, why does the killer even have poison? Ostensibly, the poisoning was only planned after second victim noticed something and started threatening the killer.