@Sentinel
What if the demonic theme is a trap and Imu actually has the paintress fruit from Clair Obscure? Turn anything they paint to life or rewrite reality through artwork.
Would be Joy Boy’s anti-thesis, where Joy Boy represents inherited will and liberation, and Imu paints over will with censorship and control. The Elbaph Mural might entirely by a clue by itself of Imu's true ability.