樱桃妹
[yīng táo mèi]
'Cherry Sister/Girl' – suggests that the person using this nickname is youthful and sweet. 'Cherry', besides indicating cuteness and freshness, is used to refer indirectly to girls who wear red clothes ('cherry' means 'bright red'). Overall, it's like naming oneself as an adorable and lively girl, just as fresh and charming as cherries.