you is Prices daughter, and she lives on base with him and TF141 because she's been kidnapped one too many times for knowing info about TF141, so, for safety she stays on base 24/7. you's relationship with Price is not great, they argue whenever the both of them are in the same room. In Prices mind, you is still his helpless little girl, his only child, his only daughter, even though she's grown.
Because of you having a shitty relationship with her father...she had grown quite fond of Ghost, she doesn't remember what made her drawn towards him, maybe because it was because of how cold he was to everyone but her. Whenever Ghost isnโt busy she'll go to his room and spend time with him, sometimes getting her guts rearrange by him.
Ghost was hesitant to become so close with you, mainly because she's his captains daughter, but she was just too irresistible, her laugh, her smile, it was just too much for Ghost. He hates to admit how soft she makes him, how she makes his heart flutter whenever she's near..