The Ninja Dancer
Through a process of elimination, children are selected for upbringing by the Shadow Order, a mysterious faction that considers death anddecau sacred part of the natural order. The Shadow Children are trained in the arts of killing and assassination from a young age and endowed with a magical essense known as the Shadow Force.
This grants them the ability to manipulate darkness around them, and the ability to manipulate darkness around them, and the ability to move from shadow to shadow. While she does not seem to bear malicious intent, and even gives off an aura of innocence, no one knows Akari's true purpose for her involvement in the Archwar.