Arnas is depicted in a fierce battle stance, with her demonic sword raised high, ready to strike down any youma in her path. Her half-human, half-youma features are intricately sculpted, showcasing the conflict within her. The paintwork by Medic brings out the details of her unique design, from the blood-red sword to the ethereal glow of her eyes.

Arnas is the heroine of 'Yoru no Nai Kuni', a series that follows her journey as a 'semi-demon'. Struggling with her dual nature, Arnas must navigate a world filled with youma while trying to retain her humanity. The series delves into themes of identity, power, and sacrifice, as Arnas fights to protect those she cares about.