Orcueid

The heroine of Tsukihime...?

Eclipse Princess of Black Blood
Born as a hybrid of Dead Apostle and True Ancestor, Altrouge was the first True Ancestor ever to hold the title of Brunestud, so she could be called Arcueid Brunestud's older sister. She was born from Crimson Moon's machinations in searching out other methods for preparing a body of proper purity for his revival due to no regular True Ancestor coming to possess his level of power. Despite being a possible successor to Crimson Moon, Merem Solomon and Gransurg Blackmore, Crimson Moon's servants, only held the later born Arcueid as their master, considering Altrouge to be an imposter who must be killed. Once Michael Roa Valdamjong stole power from Arcueid and became a Dead Apostle Ancestor, Altrouge decided to put him in his place, but was instead defeated herself. She at one point fought Arcueid and stole her long hair during the battle. Van-Fem came to hold a grudge against her faction due to Fina-blood Svelten's actions. She formed a contract with Zepia Eltnam Oberon to turn him into the phenomenon TATARI. Along with at least six other Ancestors, she planned to attend the Aylesbury Valesti ritual. She is the owner of Primate Murder.

Season 5
Impersonated Arcueid for a while.

Episode 2
Fought her less orc-like self.

Trivia

 * On the episode she debuted in, OP had made a roided monstrosity of a CAW for Arcueid that caught everyone off-guard. OP fixed her next episode, and the first creation was nicknamed "Orcueid".
 * This one IS THE MONSTROSITY