Board Thread:Questions and Answers/@comment-31190419-20170130180218/@comment-27213332-20170131062516

Tatara has been classified as "Deceased" due to the fact that we've seen his body after the clash with Takizawa. The reason why characters such as Eto have been titled as "Unknown" is due to the reason that we have not seen her body after she talks with Ken. I am no expert on the matter but I believe this to be the case.