Character from Shinrabanshou's 2012 storyline, Daimaou to Yattsu no Pillar. A demon of the Vice clan and loyal familiar of former demon lord Ark Mateus, sometimes nicknamed Arca (アルカ). She is in love with Ark, but briefly turns on him out of jealousy when she feels he is prioritizing humans over demons.
Arcana returns in the 2013 storyline, Kuja Senran, where her body is transformed into that of a child after she gives up half her magic power to save Ark's life.
