I find it kinda bitchy Nikki is out of the running honestly. The way the dev writes her character in the no men route, it's like she's been waiting for the day when she's out of the house and away from their parents to start things with him. But then the Dev turns around says she's not? I don't if it's a cheap move or maybe it's a fake out but it feels like a betrayal of the story to just say "no".
She keeps pushing him toward other girls, but then turns around and tries to seduce him in their room repeatedly. It's like she's trying to remove the temptation of him from her mind, but keeps failing at it and gives in anyway. That "I'm in control here" thing comes off as a total act so that she appears completely aloof in front of him, but then he keeps catching her doing things that seems like she's in love with him from the player's perspective. Obviously Tales is completely oblivious.