Board Thread:Character Discussion/@comment-28282242-20160423112213/@comment-27404483-20170422035952

I don't think they were just like I don't think all nightbloods are related.

The nightbloods look too different to be related, they all have vastly different traits that make be believe that none of them are related, black blood is just a rare genetic mutation from whatever Becca did when she came to Earth with her Anti-Alie injections.