User blog comment:Rrr2015/FEITAN...a Zoldyck?/@comment-5780397-20151110114649

I think it is actually a possibility. Who knows, he may be the brother who Kalluto wants to bring home. His date of birth is unknown, as his age seems to be too. Some sites report he is 28, while Kikyo is 42: biologically speaking, she might have indeed been her mother, since she originated from Meteor City. Or he might have been fathered by Silva and then abandoned, who knows. The "hair/Transmuter" connection must not be necessarily true. It would be quite the plot twist, although I'm not sure I'd like it. Depends on how it's done.