Colleen Messala worked as a contracted mage for Lord Villar Constance in the Fantasia Union faction. She had brown hair styled in buns, purple eyes, wore glasses, and a choker. In combat, she wielded potent magic, channeling destructive energy beams through a giant magical mirror against enemy ships. Despite her power, she displayed a gentle and apologetic nature, often expressing regret when unleashing her magic.

Her story ended during the assault on Castle Unicorn. Cut off from allies and overwhelmed, she found herself cornered by Ulrika, the Marquess of Starck. Disarmed, pressed against a wall with her eyes closed and crying, Colleen offered no defense. Ulrika executed her regardless, citing contested interpretations of wartime rules. This occurred as Villar's forces battled simultaneous assaults from Marrine Kreische's ground troops and the Nordic naval fleet. Colleen's death exemplified the brutal realities confronting mages in the conflict, especially those serving Villar during his stronghold's fall.