Considering both the genre and the "5 girls 5 senses!" thing, I don't have much hope for my dual Karen+Riri endgame.
ASMR girl is alright, but Karen and Riri seem like the best matches. Opposites in a lot of ways, very similar in others. And they both get along well, sharing Mei's affection! Since it won't be both, I hope one of them (Karin plz, I can hope...) is the real endgame.