Bwahahahahaha her forgetting the carriage is such a cute touch. Very relatable. Also I think she's backing off from people too fast. Litterally every guy is dangerous, I don't think there is a least dangerous to her guy here in terms of ability to do harm, it's hard mode. She needs to pick one and built affection, I'd pick whoever seemed to be the most stable.
I'd avoid the bros because I feel like building too much affection with one would inversely affect the other. The prince is a no go for obvious reasons! I still think Ikies or Vinter is her best choice, they also have the clearest, easiest ways to get close to them. Vinter may have done that to her in the game, but it's clear she can change things; maybe a kinder villainess would get a much different reaction.