我人面兽心她纯洁如水
[wŏ rén miàn shòu xīn tā chún jié rú shuĭ]
This name reflects a feeling of inferiority by portraying oneself as having a beastly heart (恶劣 intentions) in human form ('beast-like intentions'), while contrasting another person (likely a loved one) who is portrayed as pure.