Demon Soma is the twelfth and final boss in Aria of Sorrow Remade Julius Mode. He is a horned demon with wings, but he can shapeshift.
Demon Soma will charge at Julius immediately. He has 4 attacks at first: a wing slash, a fireball stream, a cursed sphere, and poison spikes which emerge from the ground. Later, he can summon demon scythes. He can shapeshift into a bat swarm which charges, a wolf that runs around and bites, and mist which will poison. He has 6000 HP in this form.