Sorry to just add the complaining, but my biggest issue with Yona and Blair is not that they're niche, it's that they're just watered down versions of the same niche as Naomi.
Lyriel is a tsundere submissive elf who loves bondage/domming/slaveplay stuff. Cait is the shy wallflower virgin who is filled with sweetness and cream and curiosity.
Rae (i guess) is supposed to be the fantasy, shapeshifting, magical succubus slut but really ended up just being the "vanilla" character with totally normal sex all the time, the only kink she seems to cater to is puns.
But either way, all three offer very different themes and kinks. Yona, Blair, and Naomi on the other hand all fall into the same archetypes. Naomi is already a huge muscle mommy, Yona is just that but green and without a personality. Naomi is already a sassy, curvy-thick as hell, dark skinned character that is very casual and open about sex, just that Blair prefers toys to cock.
It feels like all three of them could have been combined to make one properly fleshed out character.