Sebastian is devoted to Ciel Phantomhive. He faithfully carries out every one of Ciel's orders while ensuring that the Phantomhive household runs smoothly as the head butler. He does not sleep—demons deem sleep a luxury—and often spends his nights fulfilling his duties. Sebastian is devoted to Ciel Phantomhive. He faithfully carries out every one of Ciel's orders while ensuring that the Phantomhive household runs smoothly as the head butler. He does not sleep—demons deem sleep a luxury. 