Ryan Silver

Ryan Silver was a human child residing in Grants Pass, Oregon, where Eve began her creation of the Jefferson Starships. He was the younger brother of Joe Silver.

Season 6
Ryan, along with his elder brother Joe, was orphaned and captured by Eve's Jefferson Starships. After being saved by Sam and Dean Winchester, Ryan and his brother were subjected to multiple tests by the hunters to verify their humanity. Deeming the young boys to be human, the Winchesters promised to accompany Ryan and Joe to their surviving relative.

After a long drive, Ryan was finally taken in by his uncle. However, unbeknownst to the hunters and the children's uncle, Ryan was actually turned by Eve into the perfected form of the Jefferson Starship. A few moments after the hunters left, Ryan became aggressive and attacked his brother, turning him into another Jefferson Starship in the process. Joe turned in a matter of minutes and joined his brother in attacking their uncle.

Eve planned Ryan to start infecting the whole town, but Crowley and his demons managed to track Ryan. They killed Ryan and his brother and uncle before they could turn other humans into Jefferson Starships.

Powers and Abilities
Ryan possessed many abilities that are innate with Jefferson Starships. However, as he was considered by Eve to be the final and perfect form, Ryan was able to pass through common hunter methods of identifying monsters. Moreover, Eve described him to be 'intelligent, cunning and strong'. Eve also mentioned that Ryan was extremely infectious and could turn the entire town in less than a day.
 * Superhuman Strength - Jefferson Starships are considerably stronger than humans. They can easely throw a full-grown man across a room.
 * Invulnerability - They can only be killed by decapitation with a silver knife.
 * Superhuman Speed - They can move at approximately the same speed as vampires.
 * Superhuman Agility - Are more agile than normal humans.
 * Superhuman Stamina - Starships don't tire, however they still require sustenance.
 * Fangs - They have sharp, retractable fangs like Vampires, which they use to attack.
 * Spikes - They have extendable spikes concealed in their wrists, like Wraiths.
 * Shapeshifting - They can assume the form of humans being, and presumably absorb their memories, like Shapeshifters
 * Infectious Bite - Like werewolves, they can turn humans into Starships by biting them.