Main heroines, huh?
I guess we could use them as examples of how to make a custom meetings and personal quests, but if we talking about true main heroines, ie the key characters of the main plot throughout its duration on a par with MC, I'd rather have them freely customizable. Meaning that players decide who are main heroines in their games, and maybe even how many main heroines they have.
Though I have nothing against these two characters, and any events for them are welcomed, shouldn't we avoid to make specific characters too unique in a game with many hundreds characters?