The one manipulating Ocoho was Mordred, but Mordred claims that Queen Boudica herself is a traitor with connections to a shady organization called the Faithful of the Hermit. Ocoho is left unsure what she should believe, but Seth's advice helps her make a decision. On the day of the ordination ceremony, Ocoho exposes the truth and questions Queen Boudica in front of everyone, declaring that some of the knights are traitors.
That's an accusation 
I certainly didn't expect.
.هذه تهمة لم أتوقّعها بكلّ تأكيد
Mit dieser Anschuldigung
hätte ich fürwahr nicht gerechnet.
No esperaba esa acusación.
No esperaba esa acusación.
En voilà,
de surprenantes accusations.
Questa è un'accusa che di certo non mi aspettavo.
Por essa acusação eu não esperava.
Признаться, такого обвинения я не ожидала.