Sylvia

Sylvia is one of Kay Challis's many personalities that reside within the "Underground". Sylvia has a "spooky voice" and is one of Kay Challis's more volatile and threatening personalities. Sylvia is shown to primarily speak in poetic dark rhymes when surfaced.

Biography
Sylvia is one of the many personalities of Kay Challis whose mind fragmented due to suffering sexual abuse from her own father at the young age of five.

Years later, when Kay returned to Doom Manor, Sylvia began to cause chaos around the mansion, but was soon overtaken by Hammerhead.

Later after the revelation of Niles Caulder's involvement with the "experimental accidents" that gave Jane and the others their powers was revealed, Slyvia briefly manifested during Jane's confrontation with Joshua Clay where she attempted to physically harm him.

Powers

 * Metahuman physiology: Sylvia is one of the many personalities residing within Kay Challis, each of whom manifests their own power when in control of their shared body.

Season 1

 * "Pilot"
 * "Donkey Patrol"
 * "Ezekiel Patrol"