The Papillon Specter is one of the few that were physically completely changed when he awakened as a Specter. He reverted to a living form of a gel-like substance. During the invasion of Athena’s Sanctuary, the Specters apprehended Aries Mu to interrogate him about the whereabouts of their guides, the revived Gold Saints. Mew interfered and told them to back off because he wanted to fight against the strongest psychic in the Sanctuary, which he was also claimed to be in Hades’ army. During the fight he went through two stages of Evolution, from the gel substance to a monstrous caterpillar, to a chrysalis in which he underwent his final transformation into an entomomorphic human. Their fight was a display of psychic strength which in the end was won by Aries Mu. Mew had the ability to spawn small butterflies called “Hell butterflies” which he used to track his opponent with. One of these survived and came to survey the rest of the invasion and also appears in the 18th century holy war in Next Dimension.