戚欣
[qī xīn]
This term doesn't seem to have a standard translation in English. It combines the surname Qi (which means 'imperial mourning') and another character, Xīn (which generally means happiness). These are often chosen because of their sounds in relation to the user’s real-life name. Alternatively, the juxtaposition of sorrow and happiness in these characters suggest mixed or contrasting emotions the users might experience inside.