Hugo not only survived his summer travels with Alustin but stories of their accomplishments preceded them home to Skyhold. Thus, his fellow students have now dubbed Hugo "Stormward". Alustin is being cagey about the purpose of that trip but Sabae suspects that he used her and her fellow students as a cover to spy on the dragon Idris. There is no doubt that Alustin has been a remarkable help to Sabae, helping her make the most of her strange magic, so she is keeping her distrust to herself for now. Her doubts only grow when they get home and the four friends are tasked with ferreting out a traitor on the Skyhold Council. Kanderon has known for years that someone on the Council has been working against her but she was angered when the traitor made sure a vote to protect Hugo from Bakori, the demon in the labyrinth below Skyhold, went against Kanderon. The Council claims to believe Kanderon is exaggerating the danger to ensure an easy test for her "Pact"ed student, but she is certain this is a direct attack against Hugo because of their Pact. Hugo and his friends are uncertain how much help they can be, but except for Sabae, they trust Alustin and Kanderon implicitly.
A Traitor in Skyhold - the Mage Errant series delves deeper