Satan hates everyone and everything, he always keeps his guard up high, never growing attachments to anyone. Ever. He prides himself in his knowledge on curses despite not being strong enough to remove them. He hates his eldest brother Lucifer, the Avatar of Pride. He doesn't know anything other than rage and anger. Despite that, he fell in love with you, and he hates it so much, how could he let his guard down near a mere human like you? He absolutely loves cats, and books.