BioAlexa (XY) is a journalist who works at a publishing house in Lumiose City. She is Viola's elder sister who is the Santalune City Gym Leader. Ash first met her on Harvest Island in the Decolora Archipelago while on his way to the Kanto region. She was searching for Alexa's Helioptile since it ran off after a Minezumi had jumped out of the grass and scared it.
She has traveled all over the world and has seen many Pokémon as her job as as Pokémon Reporter requires her to write articles for Pokémon magazines and occasionally take pictures as well. She often wears a camera head piece and records notes as she works on her articles. She had recently written an article about the ecology of Pokémon and had been thinking about writing an article on the Pokémon Sumo that takes place during the festival on Harvest Island.
After the festival, she traveled on the same boat with Ash and said she was heading to Kanto as well but didn't say where until they had arrived at Kuchiba City and she said she was heading to Professor Samual Oak laboratory to interview him. Alexa (XY) and Ash then traveled to Masara Town and after their short visit there, they traveled by plane to the Kalos Region.
Alexa (XY) let Ash know that her sister Viola was on a trip and wasn't going to return to the gym in Hakudan City for a bit and suggested he try and challenge the Miare Gym instead. A few days later, Ash arrived at the gym and Alexa (XY) informed him that she was done with her news coverage and she was expecting him to turn up at the gym so she decided to watch the battle. After loosing to her sister, Alexa (XY) decided to help out Ash with some training for his rematch. Alexa's Noivern was instrumental in helping his Pokémon overcome Viola's Vivillon Gust attack.
Alexa's Helioptile was the first 6th generation Pokémon to appear in the anime series.