/jp/ - Otaku Culture

Shiki's Mystic eyes allow him to see the EVENTUAL FATED destruction of an object or entity expressed as small points on the object or entity's body and as thin glowing reddish black lines that extend from those points and crawl over the body. Mokou doesn't have that said fated destruction, because the Hourai Elixir erased that very entity. She may get hurt, allowing him to see the "lines", but because death isn't a part of her existence, the "dots" Shiki is supposed to see, aren't there.

It makes sense, too, because Yuyuko has a similar ability. And yet she was overwhelmed when she saw Mokou, searching desperately for the death in her. I would imagine Shiki would have a similar reaction as her.