Вероніка де Сад

A Vampire of the Crimson Moon, the second eldest child of Count de Sade and older sister of Dominique de Sade. She acts as a Beastia - or an enforcer to Queen Faustina - a result of her ability to alter World Formulae to produce ice. During her tenure as Beastia, Veronica entered an intimate relationship with fellow Beastia, Marquis Machina.

(Source: The Mochizuki Wiki)