Complex sentence: The first Shinso is Fumi Himeno and then Lena Sayers who is still alive in the manga, the Shinso also do not need to be dead prior to integration but loses their physical form after.
Split into simpler sentences: The first Shinso is Fumi Himeno and then Lena Sayers, who is still alive in the manga. The Shinso also does not need to be dead prior to integration but loses their physical form after.