Hylas

Hylas appears in Greek myth as a beautiful youth taken into the service of Heracles as his arms-bearer and beloved companion. During the Argonauts' expedition he visited a freshwater spring (identified in sources as the spring of Pegae in Mysia) where naiads fell in love with him; accounts differ as to whether he was seized by the nymphs, stayed willingly out of reciprocal desire, had his cries stifled underwater, or was metamorphosed into an echo. Heracles and companions (in some tellings including Polyphemus) searched for him; the search occasioned local foundation myths and ritual commemorations (for example a procession among the Prusians and a foundation tale linking the event to the city of Cius).

Classical sources present Hylas as a beautiful, charming youth. Theocritus describes him as 'charming Hylas, whose hair hung down in curls' and notes Heracles taught him the skills of a warrior. Artistic traditions that depict his abduction emphasize youthful beauty and attractiveness to naiads, but no supernatural physical traits are attested in the provided sources.

Hylas is portrayed as a mortal without inherent supernatural powers. His narrative functions are social and relational: he serves as Heracles' arms-bearer and beloved, and his disappearance drives the plot of several versions of the Argonautica tradition. Variant sources attribute different accounts of his fate: Valerius Flaccus describes Hylas remaining with the nymphs out of love; Apollonius Rhodius and other traditions present abduction by naiads; Theocritus records the nymphs shutting his mouth underwater to stifle cries; Antoninus Liberalis reports a metamorphosis into an echo. Beyond these narrative roles, no extraordinary abilities are ascribed to Hylas in the cited materials.