By that time, he and Phloria had long broken up, plus they hadn't talked to each other until Jirni's last birthday. Phloria had no way to know and Friya had completely forgotten that shapeshifting was supposed to be kept a secret.
"Probably." Friya corrected herself in time.
"Headmaster?" Quylla asked.
"Your sister is right." Marth said. "It's rare, but some Emperor Beasts can change their appearance. I asked for Kalla's help because the White Griffon lacks a Necromancy expert and even though she is young, she runs circles around even the Professors of the Black Griffon.
"Everyone in this room knows, since its common knowledge among the upper echelons of all the three great Countries. But it's a major secret among the general population, so keep it to yourself."
Marth didn't like the idea of sharing state secrets with children, but Kalla was still very clumsy, both physically and socially. It was only a matter of time before they found out anyway.