I really like your philosophy of creating characters you yourself like. Rachel is very pretty, not to mention Carol and everyone else tooI plan for the harem ending where the player will be able to get any combination of girls. I mean, it will depend on who the MC develops a relationship with and who he doesn't mess up with before the harem part starts. It could be Sara + Carol + Rachel or for example Roxy + Yuki + Ashley + Natalie or it could be all the girls at once.
But that's just my plans for now. More precise information will be in the future.