Christopher seems to be the previous leader of the star badges (forgot name), but seemed to have either
a) Died like shirley or in a similar fashion OR~ became the masked failed servants that dont speak or acknoledge anyone, and are tools to be used.
b) He betrayed/ was a traitor/ rebelled against "great grandfather" and was ultimately disposed of along side his "living doll" (accomplice perhaps).
c) Similar to "b" he escaped from there and is building up a faction/ group to over through this ridiculous cult/regime and is connected to the cloaked shadow from the earlier chapters.
d) similar to "a", he could have just been changed back into his original form and forgotten everything, and has been forbidden to become a shadow again? idk.
So many things to speculate! Cant wait for the reveal.