Jay-Ten (sometimes spelled J10) is one of the Zoomen that once lived within the Human Zoo on White Diamond's Space Station. She has tan skin and long blonde hair. After being rescued by the Crystal Gems, she currently resides on Mask Island.
History
Season 4
She, Wy-Six, and the other Zoomen first find the Mane Six, Connie Maheswaran and Steven Universe being placed in the Human Zoo, warmly welcoming them. Later on that night, she and Wy-Six find them trying to escape. She is confused at Applejack's mentioning of a "door," only to remember and tell a story of a Gem helping a hurt Zooman after entering through an "opening wall." However, she does not know the meaning of "hurt." She and the other Zoomen stay behind as they escaped the station.
Season 7
After the White Diamond Space Station lost power, she is tricked along with the other Zoomen to think that the sun, moon, and stars "had gone to sleep", making her unaware of the danger they were in.
Originally, she was "choosened" by the voice to be with Flint, but he declined. After Jade explains that on Earth, people are "choosened" by their own free will, Jay-Ten soon follows after Wy-Six by attempting to "choosen" Jade. They explain the full story to them about what's really going on just before a Monster Gem arrives and attempts to attack them, scaring her and the other Zoomen.
She and the remaining Zoomen were taken from the White diamond space Station, and brought to Mask Island, being re-taught how to survive on their own.