Sylphie (シルフィー) (known as Mirabella in the U.S. Genesis version) is a supporting character from the arcade shooter Forgotten Worlds, known as Lost Worlds (ロストワールド Rosuto Wārudo) in Japan.
Sylphie sells the player different weapons, armor, items and information for a cost of zenny in her shops scattered throughout the Forgotten Worlds. She also gives praise at the end of the game, once the Unknown Soldiers frees the world from the hands of the evil emperor Bios.
- Sylphie, along with the Unknown Soldiers, appear in Namco × Capcom, where she attacks with a number of weapons, attacks and costumes from other Capcom games, such as Michelle Heart, the pistols from Gun.Smoke, and Jin Saotome's Blodia Punch.
- Sylphie returns as a shop owner in Project × Zone 2.
- SNK vs. Capcom: Card Fighters Clash has a shop based on Forgotten Worlds, containing a giant Dust Dragon statue and a character named after the game, as well as Sylphie acting as a card seller in a shop that appears and disappears just like her shop in Forgotten Worlds.
- Apparently, Sylphie bows to the player when her shop is entered in Lost Worlds and greets them with vocals, whereas in Forgotten Worlds, she is silent and does not move.