The Whirlwind emote is an Rare Fortnite emote. Whirlwind was available via the Item Shop for 500 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite Whirlwind Emote Details
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Fortnite Whirlwind Emote PNG Images
Here is the PNG images of Whirlwind below!