Ok. Let's get started for starters we have...

#1: Frisk

#2: Chara

#3:Emilia (I know that Emilia feels warm around Subaru but she doesn't know what to call it because she doesn't know what love is so yeah. Still a love interest)

#4: Rem

#5: Ram

#6: Crusch

#7: Anastasia

#8: Priscilla(Possibly. Need ideas for her)

#9: Elsa

#10: Bete Noire

That's it for now. There are more girls I'm adding but for now. This is the 10, three are from the Undertale cast while the others are from the Rezero cast.

That's it until later. See ya