Sebastian Michaelis True Form. However, it's unclear if this situation actually happens in the series Sebastian is a figment, Sebastian Michaelis is not real
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Sebastian takes on the appearance of a tall, handsome adult with black hair, reddish brown eyes,[3] pale skin, and black fingernails He is tasked with solving crimes in the underworld of Victorian-era London
But what we need to ask, is who is he really? If we dig deep enough through demonology, and Sebastian's most prominent demonic traits, we can see his two prime features: Lust and Pride What does Sebastian's true form look like in Black Butler? He is tasked with solving crimes in the underworld of Victorian-era London
Kuroshitsuji Sebastian Demon Form. Overall though I think "true form" can only be applied loosely because of his ability to shapeshift, the dragon form may be shape-shifting or that could be his true form and his more humanish demon form could also be shape-shifting. He works for the Phantomhive Household as the Head Butler and is completely devoted to Ciel.
. What does Sebastian's true form look like in Black Butler? Ciel has formed a contract with demon Sebastian Michaelis, who disguises himself as his butler, to seek revenge on those who tortured him and murdered his parents