I would say its recently become more clear imu is wearing a hooded veil or something and its not just a sillhouette
I think Imu might have lost his body and become some kind of being of unending darkness, and wears the robes to maintain form
He needs to use gunko because he is bodiless, and cannot leave his castle
I think Imu might have lost his body and become some kind of being of unending darkness, and wears the robes to maintain form
He needs to use gunko because he is bodiless, and cannot leave his castle