你的月亮我的心我代表月亮选择你
[nĭ de yuè liàng wŏ de xīn wŏ dài biăo yuè liàng xuăn zé nĭ]
Loosely based on the anime phrase 'In the name of the moon', this nickname combines personal connection ('your moon my heart') with a whimsical choice, making it playful and expressive of dedication or commitment.