マッティーア・アプリーレ

A girl from the esteemed Aprile family, which serves a revered Italian lineage. She is an international student at St. Cherine's School and is residing with her guarantor, Tsukasa. At first glance, she may seem cold, but she can be warm and friendly to those she allows into her life. She has a mysterious ability that she employs in her fighting with knives after transforming.

She had the ability to manipulate the flow of time; however, due to her incomplete control over this power, she had grown distant from others over the years. Nevertheless, her unique ability caught Tsukasa's attention, and they had since fought side by side as the Twin Angels.

She confronted Augusto but was captured. After the battle between Augusto and the girls, she was rescued, but Tsukasa died. Desperate to save Tsukasa, she searched for a Holy Grail Clock that could reverse time, but failed. Ultimately, she decided to fulfill the "prophecy" from Haruka and the others by becoming the Dark Dealer herself.