Serena's Sylveon/Personality and characteristics

While Sylveon loves to dance, as an Eevee, she had a timid personality and was easily scared by new people or Pokémon as shown in her debut and in Love Strikes! Eevee, Yikes! when a wild had fallen in love with her, but frightened her instead. When scared, she tended to hide behind her Trainer or Clemont's Bunnelby or freeze up and immediately and run away out of her nervousness. She tried to overcome her timidness as she attempted to warm up to the other Pokémon of the team as shown in Tag Team Battle Inspiration! by brushing her tail on them, but to a limited success as she shied away from ’s accidental outburst. This trait led her to hesitate during her Tag Battle against Ash's Pikachu and Tierno's Blastoise in the episode, until she was inspired by Tierno, his Blastoise, and their dancing. Adapting her dance moves to her battle style, Eevee became an agile fighter capable of dodging many attacks and making unpredictable movements, quickly outmaneuvering her much larger opponent. When she evolved, she displayed her agile dance-like moves in Party Dancecapades! while battling Slurpuff and. Also in the process, she has full confidence and is no longer shy.

Sylveon is shown to have a passion for dance, liking to perform her moves on a stage-like rock prior to her capture, although she only performed alone away from others. She was dazzled after seeing Serena’s performance in A Performance Pop Quiz!, sparking her interest to perform along with Serena and the rest of the team.