Yes. I confess I haven't heard of her before either. But it is being reported that the Tokyo born player currently ranked 206 has switched allegiance and will now play as a British player.
Lily's qualification for the main draw at Flushing Meadows earlier this evening acknowledged by the Beeb. Sounds as though she may have a glimmer of a chance in the first round.
Lily (WR 148), a wild card entrant, a first round winner over Tamara Korpatsch (GER/WR 73) by 2 & 1 at Wimbledon today! She's unlikely to go any further, as her opponent in the last 64 is the 14th seed, Daria Kasatkina.