In my opinion, as a person who has Sophie as their favorite by a good margin, Sophie is self-aware as she doesn't hide the fact that her actions/past bother her and how her flaws could be the detrimental to the people around her. Ex: During the pool scene, Sophie clearly likes the MC, but does remind him that Bree possesses a strong crush on the MC as well as displaying hesitancy to pursuing the MC. Bree always sees Sophie's cautious nature as a burden, but never acknowledges how Sophie's personality benefits herself as well. I hope whenever Bree finds out about Sophie putting her hands on her bully, she will apologize for being so dismissive of her best friend.
Sophie's family situations of her mother being in a coma for years and her brothers possibly going down the wrong path are undoubtedly mentally-draining on any individual, but instead of letting those conflicts get to her, Sophie continues to march forward and "be happy". Sophie may not have been necessarily abandoned by a parent, like the MC's father did to him, but they both share the struggle of not having both parents in their lives. Although, Eve has shown complete ignorance of reading/observing Sophie, because if Eve actually took the time to know Sophie even partially, she would not think of Sophie as a smug, rich girl that never struggled a day in her life, and would be able to help Eve better deal with adversity alongside the MC (Remember the tabs on her computer/the drama with the jogger). In addition, hearing that narrow-minded viewpoint from Eve dropped her down the rankings for me, and the fact the MC didn't challenge Eve after just hearing Sophie's backstory not too long ago makes no sense to me.
At least, Sophie wishes and goes out of her way to get to know Mia better (when you are paired up with the both of them for the art project in the woods) instead of making theories about said individuals' whole lives, which I find funny. If you noticed from the start of the game, Mia would keep giving these suspicious looks towards Bree and Sophie, and would actively deny any assistance from the two of them. Yet, when Mia is forced into being paired with Sophie by Ms. Hill, her perspective changes and her insecurities (which are A LOT in my opinion) become less and less. Granted, there's still so much story that needs to be shown and as the dynamics between the characters, but in this moment, Sophie is just flat out more mature and empathetic especially if we are comparing to the likes of Eve, Bree, and/or Mia.
Finally, no, I'm not including my attraction to the characters as a point, because I find Bree, Eve, Mia, Ms. Hill, and Sophie equally pleasing to my eyes for different reasons. I'm not sure if my comment addressed your concerns or not.
