六亲不认酷girl
[liù qīn bù rèn kù girl]
This username portrays someone who is cool and possibly rebellious, not caring much about societal expectations or family ties ('六亲不认' meaning to not recognize even the nearest kin), with '酷' referring to being stylish and bold. The term 'girl' in this context emphasizes a young female who embraces an attitude of nonconformity.