Talk:Kishou Arima/@comment-26986431-20161221125721/@comment-27376835-20161221133418

Speculations : Case #1

Maybe it depends on Furuta's mother, maybe she was a member of the Washuu clan and family who was later used as a womb (but not ghoul ,like one of those .001% people like Amon and Takeomi ). Tsuneyoshi had dozens of other  illegitimate children with other women  (maybe not all of them were Washuus, the can be just ordinary humans).

Speculations : Case #2

Maybe Arima's last name was fake like Furuta's, and we already know that Rize has Matasaka's last name