浅默曾经的樱花面
[qiăn mò céng jīng de yīng huā miàn]
This poetic username combines several images and sentiments: shallow silence ('浅默') evokes restraint; the mention of past tense '曾经的' refers to something in the past; and cherry blossoms ('樱花面'), often associated with transience and beauty, imply an unspoken admiration or memory of beauty experienced in the past.