Truth appears before the alchemist in the form of a white figure surrounded by a black aura. vaguely follows the outlines of interlocutor. Truth has no eyes, hair, or skin. Truth is homogeneous. The nose and ears are visible in outline. The "face" has a lipless mouth.
Truth's character is cynical and mocking.The Truth  arrogant and sarcastic. Truth has no compassion for those it overtakes. Respects conscious people. 
[Truth from anime/manga "Fullmetal Alchemist".]