Here's you a funny question.

An Infernal with an Ascendency Mantle uses Black Mirror Shintai (bought twice) on a Solar. By the rules of the Charm...
Although the transformed Infernal remains a creature of darkness and native of Malfeas, he is not actually an Infernal for the duration, but is instead whatever he mimics.
So we're officially Solar Bob now, for an indefinate period of time.

Somehow, fake Solar Bob is knocked out, and wakes up in a Monstrance of Celestial Portion. His Willpower is beaten down before he can release the Shintai (or he chooses not to, for reasons unknown to us), and he chooses to become an Abyssal.

Can he actually be converted?