Serena

Serena was a former travelling companion of Ash who traveled through the Kalos region with him, Clemont and Bonnie.

Appearances
Time Flies (flashback)

Shorts
Why Serena isn't in Alola

Serena cuts her hair

Other
Ash Ketchup Vs. Serena

Trivia

 * Serena was voiced by Lizzie Blinx, who also voices Mallow.
 * In Episode 4, Serena was used in a gag which involved all of Ash's female travelling companions, this also includes Iris, Dawn and May, as well as May's Mom with the punchline being "...and that's why Misty's a virgin!"
 * Serena has made the most appearances than the rest of Ash's former companions.
 * (ALL THIS IS FAKE: SERENA DIDNT DIE.)