Imu feels the death of Harald specifically because of the way Seals work as opposed to Domi reversi
Gunkimu tells dory and Broggy that “in exchange of your lifespan, you are granted demon power”. So Domi Reversi it takes the actual lifespan of the person themselves and converts it to Power.
Whereas Seals are Imu himself putting his own power into you. Hence why an immortal dying actually affects Imu. While on god valley rocks kills his whole family as demons and it doesn’t matter. Then rocks gets obliterated out of demon form and it doesn’t matter. The powers aren’t actually directly coming from Imu so he doesn’t feel anything when you kill demons yet he does feel it when you kill immortals with his seals
Gunkimu tells dory and Broggy that “in exchange of your lifespan, you are granted demon power”. So Domi Reversi it takes the actual lifespan of the person themselves and converts it to Power.
Whereas Seals are Imu himself putting his own power into you. Hence why an immortal dying actually affects Imu. While on god valley rocks kills his whole family as demons and it doesn’t matter. Then rocks gets obliterated out of demon form and it doesn’t matter. The powers aren’t actually directly coming from Imu so he doesn’t feel anything when you kill demons yet he does feel it when you kill immortals with his seals