Here is an overview of the character, via western publisher NIS America:
The host of the Queen of Fighters tournament in SNK Gals’ Fighters back in 2000, MissX returns to the arena as a participant. Although she bears a resemblance to another renowned battler, MissX is her own brand of badass! Her attacks may seem familiar, but she’s also got new moves that no one will see coming!
Watch the announcement trailer below.