Hǎilán had special abilities, flying around the world at will, and she had doting brothers and parents. Since she wasn't physically strong, the adults naturally gave her more attention; she was a princess showered with countless affections.
Wushuang didn't actually envy these things, as she also had loving parents and relatives, no less than Hǎilán.
The crucial difference was Kaka...
The unspoken understanding between Kaka and Hǎilán made her deeply envious. Kaka always knew what Hǎilán wanted without her needing to speak. He doted on her, cared for her, and looked after her. Whenever the three of them were together, Wushuang always felt like an outsider.
Like a tearful clown, no one noticed her presence...
Kaka, back then, had eyes only for his princess.
