酷到六亲不认柔到普度众生
[kù dào liù qīn bù rèn róu dào pŭ dù zhòng shēng]
This username suggests two extreme personality traits that the person seems to have - they can appear aloof and tough ('Six relationships unrecognized'-not even recognizing relatives because being cool), as well as caring and kind-hearted ('saving all sentient beings-universal benevolence') to everyone.