He said that there would be 'at least 5' so not all of them will get epilogues, we can be sure that from those 5 there has to be Ophelia, Brenna, and Catherine. You can theorise Lucia (though her is like a 95%) and Aliza... or Tiff.
BUT!!! I do like the idea of every character having an epilouge, and since they are isolated scenes they have been confirmed that each would take like 2 months max, so like 40 months of consistent content with all characters sounds like a dream, there isn't a single character here I don't like so I will look forwarth for every epilogue.
You know what? Let's play a game, how many characters that could have an epilogue.
1. Ophelia
2. Brenna
3. Catherine
4. Lucia
5. Aliza
6. Eva
7. Tiff
8. Nora
9. Keira
10. Amber
11. Kumiko
12. Mallory
13. Tsukiko
14. Natsuko
15. Rebecca
16. Flora
Characters that could be popular enough for an epilogue: Eileen and Penny
Characters that if they get an epilogue would be just for the meme: Nurse Rachita, Batsheba (though from the teasers her epilogue is in chapter 13)
Characters that aren't appearing: Heather, Roxy, the receptionist on the lawfirm that gave them David's possesions from his will... and all male characters I guess.
16 characters that's for 32 months... sounds like a nice chunk of content... if I ain't missing someone.