Board Thread:General Discussion/@comment-27157618-20130823030705/@comment-12864920-20130928033334

Xmortal wrote: The DNA could mutate, when mutate change its effect. Remember that between the time of Fey and Tenma are 200 years of differences. Being able to have multiple mutations during those years.

That could be possible, but since Kuroiwa rejected Garsha and Vanfeny for being a member of the Earth Eleven (game plot), it could be possible that the mutated SSC DNA is not as perfect (or does not reach certain conditions) as the DNA of original humans, thus causing them unable to release souls or they have weaker souls.