Fire Emblem: The Sacred Stones
When Renais is attacked by the forces of Grado, King Fado makes his daughter Eirika leave the castle with his trusted knight, Seth, on her side. When Eirika and Seth leave the castle, they encounter Valter, one of Grado's generals. Seth fights against Valter in order to protect Eirika, but he gets hurts in the process. As the battle begins, Seth grabs Eirika and both head on to Frelia.
Fire Emblem Awakening
Eirika makes an appearance in Awakening as a DLC/SpotPass unit.
Fire Emblem Heroes
Eirika is a playable unit in the gacha mobile game, Fire Emblem Heroes. She was added to the game alongside her brother Ephraim on February 15th, 2017.
Super Smash Bros.
Eirika makes an appearance in Super Smash Bros. Brawl as a sticker and Super Smash Bros. Ultimate as a spirit.