User blog comment:Arachne sama/Shinigami Skills Heredity/@comment-8295743-20130615003956/@comment-8051005-20130615134826

Great points, thanks!

Also I just looked up Ginrei in all three manga chapters he appears and no clear view of his zanpakutou. Unless there is something in the Masked books, you might be right about it being anime's own contribution to the subject of heredity.