Saint Mu has been our most eager Saint thus far, and if not for Saint Vau's sheer strength, she would be the most dangerous first generation Saint.

She appears playful but is deeply analytical and will always go for weak spots on enemies. She seems to delight in the pain this causes, and her speed is unmatched.

She is totally devoted to the Angels and serving humanity.

Because her Sanctification was more traumatic than the other Saints, her head has been compromised. 

I recommend that she is Sealed BEFORE an incident occurs.

I continue to recommend Sealing all Saints upon their Sanctification.

-Message from the High Priest to the High Angel