#9 First ever women's Sole Survivor and Royal Rumble winner
Though overshadowed by her Rumble win two months later, Asuka emerged as the sole survivor at Survivor Series 2017, securing the victory for Raw's women's team that night. Being the sole survivor at a Survivor Series signals some good things about a competitor's Rumble prospects, and they did indeed with Asuka. While there have been other female Sole Survivors, none went on to win a Rumble, and won't in the coming year.
By combining both feats, Asuka joined the ranks of a truly elite pantheon in WWE history:
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Hulk Hogan (1990 Survivor Series, 1990 and 1991 Royal Rumbles)
Ric Flair (1991 Survivor Series, 1992 Royal Rumble)
Lex Luger (1993 Survivor Series, 1994 Royal Rumble)
The Rock (1996 and 2001 Survivor Series, 2000 Royal Rumble)
Randy Orton (2003, 2004, and 2005 Survivor Series, 2009, and 2017 Royal Rumbles)
Roman Reigns (2013 Survivor Series, 2015 Royal Rumble)
Asuka (2017 Survivor Series, 2018 Royal Rumble)
Other women may go on to repeat this feat, but there can be only one first.