Board Thread:Questions and Answers/@comment-32556318-20170712153049/@comment-36009152-20200116234454

Then it's another layer if that black substance is seraph related XD It's not about believing Asuramaru that much, of course we know he could have lied, it's just since he is a demon Asuramaru has the best insight into what Yu is based on what he can observe. It's not a complete picture but with what he says it's probably a good view to consider.

It's also a good question on how Yu's parents found out about the seraph within him. If they raised him from a baby, who suddenly told them. If he was adopted at that age, again who revealed that info, but also it's even worse if Yu were not implanted with the seraph gene but had it added to him or something... and his parents still done that :O