Sylveon resides with Eevee and its evolved forms in a large treehouse within the animated special "Eevee & Friends." It first meets Pikachu, Oshawott, Pansage, and Axew playing in a flower field, inviting them to a treehouse party and exhibiting a welcoming, hospitable nature.

Inside the treehouse, Sylveon forms part of a familial group with Eevee and all its evolutions. It expresses concern to Pikachu over Umbreon's absence from the gathering. When Umbreon returns with additional Pokémon guests, Sylveon joins in a celebratory light display, using its ribbon-like feelers collaboratively with Umbreon's illuminating abilities.

Sylveon's behavior reflects its species traits, utilizing its feelers expressively during interactions and the light show to communicate and foster emotional connections. It acts as a peacekeeper during the party, swiftly removing Meowth and Wobbuffet when they misinterpret Umbreon's guests as threats to prevent conflict.

The special emphasizes Sylveon's integration into the Eeveelution community, sharing close bonds with its siblings: Flareon, Jolteon, Vaporeon, Espeon, Umbreon, Leafeon, Glaceon, and an unevolved Eevee.