Vicexx

As one of the Hakkesshu (Orochi's assassins), Vice joined forces with Mature to serve their master, Orochi. The two took orders from one of the Four Heavenly Kings of Orochi, Goenitz, even though they didn't like him. Goenitz ordered the two to keep an eye on Rugal Bernstein who was attempting to use Orochi's power, so they posed as his secretaries. When Rugal kidnapped Saisyu Kusanagi during the events of King of Fighters 1995, Vice was ordered to brainwash him. He put up a fight, but she eventually succeeded.

After Rugal was killed at the end of the KOF '95 from being unable to contain the Orochi power, Goenitz ordered Vice and Mature to follow Iori Yagami, due to his Yagami heritage of the Orochi power and to bring him to the KOF '96 tournament. Goenitz was defeated by Kyo Kusanagi and Iori at the end of the tournament, but Vice and Mature betrayed him, deciding Iori was a better ally to help them awaken Orochi. Their plan backfired however, as Iori entered the Riot of the Blood and attacked them, apparently killing them. Although dead, the two can take the form of solid shadows in the living realm.

The two continued to haunt Iori in his dreams and eventually revealed themselves to still exist in the mortal realm before the beginning of The King of Fighters XIII. Both Mature and Vice want to prevent Orochi's power from being stolen by Ash or Those from the Past. Mature looks forward to seeing Iori fight without his flames. They agree not to hold a grudge against Iori 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.