Chouno Amu

Am Chouno is part of an idol unit known as "Rummy Labyrinth" along with Luna Yumizuki. She uses a Granblue deck with "Vampire Princess of Night Fog, Nightrose" as her ace. [spoiler]It was revealed in episode 17 that she is also Ace, the person responsible for Shion Kiba's family losing their company.[/spoiler] (Source: Cardfight!! Vanguard Wikia)