Neizai One

Rea Second is a member of the Church whose alter ego is Neizai One, a mysterious masked woman working under Ulyte's wing with an unknown agenda.

Background
Neizai One briefly joined Lashara's platoon after the Head Church's headquarters was destroyed by Doll, but she later appeared to show her true colors at the Barrier Workshop while holding a mysterious object in her hands, which was later revealed to be a device that eliminates Core Crystal data.

However she in fact "was" Ulyte, or a part of him. She explained to Kenchi that she was an Artificial human like Doll and had been secretly working against Lord Babalun the entire time. She also explained that due to the Core Crystal put inside Ulyte's body by his father when he was young, his body and personality changed to that of Rea when her awareness became stronger. However, the Core Crystal took its toll on the part that was Ulyte and it finally gave out, forcing the part that was Rea to take over.

It is hinted that she has feelings for Kenshi, although she is more ambiguous about them than the other girls that fall for him.

Her Seikijin is grey with a cape and a mask with active camouflage armed with a large sniper rifle.