The Otome Heroine's Fight for Survival: Volume 4 by Harunohi Biyori

After bonding with a mythical coeurl and failing to kill Graves, Alia gets recruited by her old mentor Viro to join his party, the famed Rainbow Blade. Alia heads to the royal capital to take care of the necessary proceedings at the Adventurers’ Guild, and to meet with the rest of the party so they can prepare for their mission: escorting the young royals of Claydale during a dungeon expedition. Knowing that Princess Elena is among them, Alia feels she has no choice but to go along with the plan. As usual, trouble follows Alia wherever she goes, and when she finds herself in a difficult situation, she reunites with an old ally...