Regrettably I accidentally made him look like a legitimate demon or something...I kinda fouled up with his hair dye, it made it look like horns kinda.
Nevertheless, he's not a demon, he's just bursting with his Red Spirit energy.
Even so, this is Aika's other form. He's a lot more muscular, his skin turns dark red, and his spirit energy flows wildly.
Judge for yourself.
-TDE