I made the mistake of telling instead of showing with her, stupid mistake
If this was a tv show, it could be done later via flashbacks, but since here you as the player have to make a choice with an unknown quantity it doesn't work the same way. The dinner date is top tier and she was my blind pick until I discovered Kimberly.
I mostly agree with the others, if I have a default girl at the start, or a LI that feels is the writer's pet, the first instinct I get is how do I get rid of her so I can start playing the game
I tried avoiding the "Riley effect" with Eun-Ji, but when it comes to her sister, no matter how she looks, everyone will want a payback.
If they aren't completely repulsive players will want to mount them, nothing you can do. Even if they are repulsive Joshy will want to mount them.