Silenus (シレーノス, Shirenosu) is a demon in the series.
History
The tutor and companion of the Greek god Dionysus. He was said to be the most drunk, wisest and oldest of all of the god´s companions and that he possessed the power of prophecy when drunk. Although most of Dionysus companions were satyrs, Silenus was not one of them but a sileni, a creature similar to a satyr but with horse features instead of goat ones.