'Having just mentioned my ability to control people, I'm guessing Elaina is wanting me to use this ability against Freja.' Personally, I didn't mind doing such a task, but at the same time, I would hate to force Freja under my control if it turns out she isn't a traitor.
We still didn't know Freja's intentions or what her relationship was with the Pope. He had put Himeko on a leash, so it's very likely that Freja is also on one.
"If you end up fighting Freja in this next battle to free Shaman's parents, I want you to use your ability to take control of her. You will have to weaken her until she is almost dead as that woman basically has an unbreakable will, so there is no chance you could control her right away." Elaina explained the mission and it was exactly as I expected.