Blue Knight has a prejudice towards all humans due to his past experience with them, refusing to communicate or listen to anyone and is hostile towards those that have harmed other robots. He also feels no remorse if humans are killed in his attacks nor does he hesitate to destroy other robots who oppose him including. Despite his views, he is not heartless, and was willing to work with Astro Boy to save humans on multiple occasions, though usually only if fellow robots were in peril as well.