Vice/Story

Past
Vice is of the Hakkesshu. She joined forces with fellow Hakkesshu member Mature to serve their master, Orochi. The two often took orders from the superior Hakkesshu and one of the Four Heavenly Kings of Orochi, Goenitz, though she didn't like him. Goenitz ordered her and Mature to keep tabs on Rugal Bernstein; a man who desired to wield Orochi's power and had been granted some by Goenitz.

The King of Fighters '95
Both her and Mature posed as his secretaries to keep a close eye on him and kill him if required. When Rugal kidnapped Saisyu Kusanagi at some point during or before The King of Fighters '95, Vice was ordered to brainwash him. She succeeded, though not without difficulty due to his resistance to the process, for which she developed a grudge against him.

The King of Fighters '96
After Rugal died at the end of the KOF '95 from being unable to contain the Orochi power, Vice and Mature's duties were switched to keeping an eye on Iori Yagami instead, due to his Yagami heritage of the Orochi power. They were to bring him to the King of Fighters 1996 tournament. At the tournaments conclusion, Goenitz arrived and their identities were revealed. When Goenitz was defeated by the combined efforts of Kyo Kusanagi and Iori, Vice and Mature were called upon by Goenitz to help. However, the two betrayed him, deciding to use Iori to attempt to awaken Orochi, having liked his company and hated Goenitz all this time. Their plan backfired however, as with Goenitz's vengeful warning before passing away, Iori entered the Riot of the Blood and the two discovered he was unable to control the Orochi power.

The King of Fighters '97
Iori, for the past year, has been suffering from mysterious headaches and hallucinations. While he had no intention of joining this year's KOF, he is suddenly approached by Mature and Vice. Although dead, both women continue to haunt Iori as shadows to entertain themselves, with the two mocking Iori's inability to kill Kyo. Iori decides to joins KOF, albeit as a solo contestant, to kill Kyo.

The King of Fighters XIII
Vice and Mature eventually revealed themselves to still exist in the mortal realm before the beginning of The King of Fighters XIII. Claiming to not hold a grudge against him, they agree to entertain themselves as his teammates in the latest tournament. The women want to prevent Orochi's power from being stolen by Ash or Those from the Past and convince Iori to join with the lure of confronting Ash. After the climax of the KOF XIII tournament, Iori's magatama returns to his possession and the weakened Orochi seal begins to strengthen itself once more. She and Mature ask if he truly wants to accept the magatama and the Orochi blood once more, offering him a final chance to completely eradicate the cursed fate from his bloodline. When Iori refuses their offer, the women fade away. They state they will meet him again in his dreams.

The King of Fighters XIV
Vice and Mature return once more while Iori visits a grave. Vice tosses him an invitation to KOF, she mentions that this KOF is just the beginning of the nightmare. Just like in the previous tournament. After the climax of the tournament, Vice and Mature don't stop Iori who was going to seal Orochi. Mature states that all destinies are beginning to shift, with Vice agreeing, she comments that Iori can't resist his blood once it boils. The women return to the dead once more.