Sakagami Kouya: Kouya and Yamato were lovers until Kouya “cheated” on her with Zero due to the consequences of not participating in the ring event. Due to the distress caused by finding this out, Yamato got rather sick and eventually lost her memory of her time on Salkia Island. When she finally met with Kouya again, she learned Kouya had feelings for someone else, and the two parted on not so great terms. Currently, while Yamato still loves Kouya, they are not together.
William Birkin: Birkin is something of a surrogate father to Yamato. Or so she assumes. He has admitted her to be something of a child figure to him, and Yamato is willing to accept that position as she doesn’t know what it’s like to have a father figure in her life. The only parent she has ever known is Nagisa-sensei, and she definitely thinks Birkin is better than that.
Alice Liddell: Yamato sees Alice as somewhat of a little sister. She greatly enjoys spending time with her and talking with her, though she also feels the need to protect Alice from the unpleasantness of life. She also enjoys lightly teasing Alice.
Aerith Gainsborough: Yamato finds Aerith completely adorable and incredibly sweet. She greatly appreciates Aerith’s offer to help Birkin after he infected himself with the G-Virus, and Yamato was taking care of him. She would really love to get to know the flower girl better.
Aoyagi Ritsuka: Yamato loves Ritsuka as something of a little brother. She worries about his well-being quite often. She knows she can’t do as much for Ritsuka as she would like due to Kouya and Youji, but she’s okay with that. She’ll do what she can.
Sagan Youji: Youji is one of the brats. Yamato realizes he’s just a kid, though he can grate on her nerves sometimes. The thing that annoys her most is when he’s supposed to be looking out for Ritsuka, and he fails to protect him. Still, she gets concerned over him as well.
Kiryuu Ichiru: Yamato has never actually met Ichiru face to face, but she has spoken to him and she knows he is the person who currently has Kouya’s heart. She has very mixed feelings about him. She isn’t fond of him because he took Kouya’s heart from her. She also thinks he’s an idiot for rejecting Kouya. If she ever met him it would be awkward and not particularly pretty.