User blog comment:EmirK/About Kihara Amata's son and espers in Kihara family in general/@comment-5230978-20130712164814/@comment-11612775-20130712165505

Actually it is implied that he(Gensei) is more closely related by blood to him(Amata) than most of the other 5000 Kihara family members in a (canon) sidestory.

Even if he weren't, that would hardly mean anything to either of them. They'd force Pierce to become a lab rat should they've seen the potential in him to become a high-level Esper either way (in Gensei's case Level 6 a.k.a. System).

Man, I wonder how powerfull such an existance would be compared to Othinus?