Shermie/Story

Past
The true origins of the Orochi fighter known as Shermie are shrouded in mystery. She, along with Yashiro Nanakase and Chris formed a music band called "CYS" (based on the first letter of the name of each member), where Shermie played the keyboard.

The King of Fighters '97
They enter the KOF '97 tournament due to Yashiro's grudge against rival musician, Iori Yagami. Though originally not qualified for the tournament due to deciding to enter after the preliminaries were already over, the trio had succeeded in still getting in by individually assaulting and defeating each member of the qualified American Sports Team (Heavy D!, Lucky Glauber, and Brian Battler) while stealing their invitations from within the process.

When Shermie remembers her duties as one of the Four Heavenly Kings of Orochi, she, along with Yashiro and Chris uses the tournament in order to gather enough power from the fighters so that the trio themselves can help awaken Orochi from its long dormant sleep. Near the end of the tournament, both Yashiro and Shermie commit suicide in order to transfer their remaining energy into Chris and because of this, Orochi is able to return to the world while using Chris' body as the host, but Orochi itself is re-sealed again by the Three Sacred Treasures: Kyo, Iori, and Chizuru.

The King of Fighters XIV
Verse's defeat during the events of The King of Fighters XIV had released numerous souls and has caused many who have perished throughout the series to be brought back to life. Shermie is revived as a result, along with her comrades, Yashiro and Chris.

SNK Heroines Tag Team Frenzy
Although Shermie herself did not participate in the fourteenth KOF tournament, due to her recent revival at the end of the said event, she is immediately pulled into Kukri's pocket dimension along with most of the fourteenth tournament's female participants, including both gender-swapped Iori Yagami (under alias Miss X) and Terry Bogard. In her ending, she had a nightmare of her lord, Orochi, being tamed by the songs from The Band of Fighters during a band battle between her band and the opposing band. She soon wakes up from the nightmare to practice for a upcoming concert with her bandmates.

SNK Gals' Fighters
Although considered to be a non-canon game to the main storyline, it is revealed that the New Face Team are now living peacefully. They have long given up on awakening Orochi, due to his foul mood after being resurrected. A letter informs her of the Queen of Fighters tournament. Interested in the tournament's participants and prize, Shermie enters the competition in her own given time and accord.

After winning the tournament, she uses the K' Talisman to get a cage for her new hamster, which is having babies soon. She is happy at first, until Yashiro points that she could have used the talisman to free Orochi.

Neo Geo Battle Coliseum
Despite being another non-canon game to the main storyline, the story itself takes place where Shermie beats Lucky in a basketball match to obtain his invitation to the tournament. She originally enters to create scene in order to help promote her band for their concert the following week but simply forgets her initial reasons by the end of the competition. She is congratulated by Yashiro and Chris for her victory, the two excited and convinced their next performance will be a huge success.