Rumay Wang (born April 18, 1991), better known as Hafu, is an American Twitch streamer and former professional World of Warcraft, Bloodline Champions and Hearthstone player.

[3] More recently, Wang's main focus has been on her career as a live streamer, although she has taken part in some gaming tournaments, most notably for Hearthstone.

Several thousand people regularly view her Twitch streams, and she has over 1 million followers on her channel.

The increasing popularity of the game in part allowed her to become the second most-viewed female streamer in the month of November, only being surpassed by Valkyrae.

[10] Wang married fellow Twitch streamer David "Dogdog" Caero, on April 13, 2021.