Where is Evie in Fortnite?

Excuse me, I'm curious about a particular inquiry in the realm of gaming. Could you please elaborate on the whereabouts of Evie within the popular video game, Fortnite? I understand that the game offers a vast and ever-evolving world, and I'm eager to know if there's a specific location or mode where players can encounter or interact with this character. Is there a mission, challenge, or event tied to her appearance? Your insight would be greatly appreciated.