外形上柔情女心理上小怪兽
[wài xíng shàng róu qíng nǚ xīn lĭ shàng xiăo guài shòu]
This phrase means someone may be gentle outwardly but have an unpredictable personality inwardly.'Soft outside, monster inside', this sentence conveys that this girl looks feminine but has many unexpected sides. For instance, she may enjoy extreme sports while seeming quiet or express opinions frankly.