User blog comment:Rrr2015/FEITAN...a Zoldyck?/@comment-25267670-20151110090107

No it's not possible. Since Fei is an inhabitant of Meteor City, not Kukuroo Mountain, so he is not a Zoldyck. And remember, Kikyo doesn't belong to the bloodline of Zoldyck and Silva only has 5 sons(Fei is not one of them). And most importantly, the Nen types of the Zoldyck members are white = transmutation, black = manipulation, not the other way round.

(Sorry for my poor grammer)