Lilly Kane/Story

Fatal Fury series
Lilly, like her brother, is originally from England, but the two immigrated to the United States; eventually taking up residence in South Town. While there, she ends up being asked on a date by Joe Higashi much to her brother's chagrin. Seeking peace, Lilly later returns to the United Kingdom with Billy. Currently, she is unaware of her brother's criminal pursuits while serving his former employer, Geese Howard. However, it is heavily implied she has begun developing feelings for one of her brother's rivals, Joe Higashi, since Fatal Fury 3.

The King of Fighters series

 * Lily's life is exactly the same as her Fatal Fury counterpart.

The King of Fighters XIV
Joe teases Billy and asks about Lilly's whereabouts, to which he answered in a hostile manner.

The King of Fighters XV
Finally, Joe and Lilly have made a schedule for their first-ever date, but things go south and Billy instead appears, assaulting Joe with his staff.

KOF: Maximum Impact 2
Lilly is happy to be back in their hometown in England and at last living in peace without worrying about fighting. However, one morning she wakes up to discover that Billy has not only returned to the United States, but has traveled back to South Town for a fight. Angry and worried about her brother, Lilly decides to go to South Town to bring Billy back home. She shows up in Billy's ending, throwing a tantrum at him.