Serena is a Pokémon Trainer from the Kalos region and was one of Ash's traveling companions. Her goal is to be named Kalos Queen the highest prestige achievable for Pokémon Perfomers. She and Ash met before the start of the series when Ash aided her in her time of need. She developed a strong crush on him from that day on and it is one of her most notable characteristics, evident through her blushing whenever she looks at, talks to or amazed by him.
Serena is a very kind and polite girl. But she can be sassy and mad when she gets dirt on her. She is always concerned about what her friends are doing. She also has a passion for fashion and clothes. She tries to find the prettiest clothes, and finds that whatever her mother picks out tends to be the less fashionable variety. Knowing this, she hates getting dirty and being soaked in mud. She loves to bake for her friends, who always delight in getting to eat what she makes for them. Serena has developed strong feelings for Ash, constantly blushing when interacting with him. She has also begun to take on his determination, greatly inspired by his motto: "Don't give up till it's over", and as such begins to takes hits for her Pokémon like he does. She also tends to get flustered whenever someone brings up her crush on him and blush quite heavily, namely whenever Miette appears or when Shauna accused her of liking him all together, she also seemed rather flustered when Penelope requested Ash to be with her before discovering what she really meant. Serena possesses a unique charm when it comes to Rhyhorn, possibly due to her upbringing, nearly all of those that she encounters gravitate towards her without the girl in question doing anything.