A Ptolemaic Army soldier, she proclaims herself as one of Miharu's "best" pupils, despite her insistence that she never trained her. Whereas Miharu is limited to mostly melee combat, Matilda has modified Miharu's attack style to her own needs, which also includes the addition of ranged combat where her spear can also act as a gun and rocket launcher. She appears to enjoy dressing and acting as a rodent, given her facepaint whiskers, her hair ribbon adding "ears" along with her combat sounds.