Yakumo has absolutely nothing to lose. She's lead a charmed life, and she has God-mode on as far as her dealings with Eri are concerned. We know that Eri loves Harima. We know that Yakumo currently does not. Who has more to lose, and who runs the bigger risk of rejection? Which one of the two is more afraid of rejection, for that matter?Originally Posted by OMGItsTehSARS
The entire manga has constantly thrown Eri into hardship. Even from the first chapter where Eri was introduced, Tenma makes it clear that Eri comes from a lonelier household than either of the Tsukamoto sisters. When Eri broke down into tears in Ch.212 feeling that she has to give up her relationship with Harima in order to keep her friendship with Tenma, and after being assaulted by Yakumo, who did she have turn to? Her dog.
Eri's friends are so important to her because they are the only thing that she has. Her family is absent, and her connection to them is one of responsibility and duty. She can't afford to give her friends up, even if she thinks that Harima is the guy of her dreams. That's part of the reason why she's so insecure, and why she constantly tries so hard to make them all happy. In Ch.212, for example, she thinks that it's somehow her responsibility to see that Tenma stays smiling.
Generally, people seem to have difficulty seeing past the chapter that they read last. Yakumo cried because if she wasn't made to show any remorse for hitting Eri, Yakumo would continue to be labelled a bitch for the rest of the manga by a good chunk of the reader base.