Talk:Lenka Utsugi/@comment-26919297-20151010040153/@comment-1419424-20151011044928

Soma's an exception because his entire physiology was bonded with the Oracle cells while he was still developing in Aisha's womb in an embryonic state. His dividing cells mixed with the Oracle cells, making them his own.

For all other God Eaters, though, since Oracle Cells are a foreign (and hostile) substance, they will actively attempt to devour the bodies of their hosts, in much the same manner as a human body will attack a transplanted organ without immunosuppressants. In this way, the Oracle cells are the immune response, and the Bias Factor is the immunosuppressants. Soma is a being who can naturally produce these "immunosuppressants."

...which really makes me wonder why he needs a bracelet...