What's your favorite female in Pokémon? Why? Mine's Lillie, because she is important to the storyline. Also people are theorizing that Lillie has a crush on Ash. She literally blushes around Ash!
Protagonist-wise, probably May. I grew up with Hoenn, and I loved character in both the games and the anime. Other than that, Winona is my favorite Gym Leader. She had not one, but two unique Pokémon (A giant Skarmory and a Shiny Swellow) and I thought her hairstyle was pretty... Other than that, her Altaria swept the floor with me the first time I battled her. Dragon Dance is scary.
I'd say Lillie is my favorite too. Even though Serena was my favorite at first but then Lillie came so yeah, Lillie it is.
I really like Mallow. She's cute, she's fun, and her relevance to the show is not based solely on her relationship with Ash. And I kinda think that she and Lillie are cute around each other.