Board Thread:Questions and Answers/@comment-8959286-20130927152419/@comment-16571503-20130928090409

There is also that Terumi tried to troll with Ragna that he was artificial being in the true end of CS but it seemed like that Ragna already knew.

Also ragnas favorit line about fighting as an human being all the way to the end also point to him not being normal human.

There is two picture of ragna having an mark on his chest, one is the cover of one of the soundtracks, though you cant read the number and then it is one more where you can read the number six on.