In the picture with Kaley, this is Alia or Diana. This is understandable by hairstyle. Most likely Alia. Naomi has straight hair, it's not her. There are no more women with this hair color.
Why don't many like the love potion? This is an important thing in the game. A great tool to make the plot interesting. I hope MC will cunningly use the drink of love and, with its help, will be able to seduce women who have not yet been fucked. If he and Naomi act together, other women will become addicted to the love potion.