The thing with Emma, in my opinion, for any kind of normal relationship is the lopsidedness of the current paths for her. Either you, the player, are an unmitigated a... or she, Emma, is one. There has been hints that a more leveled path for Emma is in the game, but I never found it out so far.And she was. The entire first chapter was about Emma making moves on the MC and the rest of the group trying to hook the two up. Because in their eyes, they are the designed pair and something MC needs to cure his depression.
I mentioned it several times already, the BY FAR best girls in the game are Lea, Jen and Olivia, no matter if you follow their kinky or love paths (or a mixture of it).