Shadow Bonnie is not a soul, nor is he a robot. He is agony in its purest form. The agony suffered by each of the children, the feeling, the energy of agony that is present in Freddy Fazbear's Pizza. Its rabbit form based on Toy Bonnie is precisely to refer to the trauma left by the "yellow rabbit". A cold, sadistic, psychotic, depraved entity, with a very strong sense of justice and a desire to kill. His voice is something quiet and at the same time demonic. Shadow Bonnie is aware of her abilities and constantly extols them, not as an inflated ego, but to warn of the harm this entity can cause. Feel free to audition however you like with lines that you find interesting for the character.