Neco-Arc is a simple parody of Arcueid Brunestud. The name is written as "neco" because it is the romanization that has been used from the start by French Bread, even though the more used romanization of the Japanese word for "cat" should be "neko".
She appears as playable character in Melty Blood, appears in Ciel's Lesson in Tsukihime, and cameos in Kagetsu Tohya in one rather strange fight scene.
She's also a playable character in [Fate/tiger colosseum]
Character
Type: Neco
Gender: Female
Hair Color: Blonde
Eye Color: Red