I went through the heartbreaking pain of separating their paths. Now that it is done, I can safely say Athena is perfect. I love all her scenes and the big date scene sledding together was my favorite.
I would've chosen Athena solo to begin with if it weren't for the heartache. Heidi, while she is the harem mother, just had parts of her personality that I did not mesh with from the beginning. Maybe it was that she was so brazen about her relationship with Athena, or the that she was a bit too over-the-top and open about their lovemaking. It certainly has a bit to do with her arrogant perception of herself. Arrogance is not attractive.
Whereas Athena is more reserved (in behavior but obviously not in body art). Her gamer personality is obviously hot. When she is falling in love with him, there are these sexy little looks she gives the MC when she doesn't think he is aware of her watching. Coincidentally, Val does the same thing!