In episode 6, Mai Valentine uses this card during her Duel against Joey Wheeler. She Special Summons this card via "Elegant Egotist". Due to the effect of "Elegant Egotist", this card can't attack on the same turn it's summoned, so Mai ended her turn. Joey then summons "Time Wizard" and activates its effect. Joey succeeds in the effect, so the effect transforms "Baby Dragon" into "Thousand Dragon". The effect also ages this card, which decreases its ATK to 1300. "Thousand Dragon" then attacks and destroys this card, winning Joey the duel.
In episode 11, Mai uses this card during her Duel against an unknown opponent. This card then attacks and destroys Mai's opponent's monster, winning her the duel.
This card also appears in a flashback Mai has when she notes to herself that Joey only defeated her because Yugi was coaching him.
In episode 14, Mai uses this card during her Duel against PaniK. PaniK's monsters attack and destroy this card, which won PaniK the Duel.
In episode 18, this card appears within a series of flashbacks Joey has when he remembers all the times that "Time Wizard" gave him a miraculous win.
They seem to show emotions in this episode, meaning they may be spirit monsters like Dark Magician and Dark Magician Girl as they were shocked and completely stunned when "Harpie's Pet Dragon" was destroyed, however unlike the Dark Magician and Dark Magician Girl, they didn't speak.
This card also appears within Mai's backstory flashback when she reflects on her lonely childhood and the life she had before Duelist Kingdom. Mai noted that her only companions were her "Harpie Lady" cards back then before she met people who would become her real friends.
In episode 152, this card is shown in a flashback Mai has when she states that her fear of losing eventually made her felt that she was completely helpless and scared of losing until she met Valon. Mai uses this card during her Duel against Valon. Valon's Armor monsters attack and destroy this card, defeating Mai. After the Duel, Valon offers to help Mai not feel lonely anymore. Mai accepts the offer as she felt she had no other choice.
In episode 173, Mai uses this card during her Duel against Joey. She summons this card via "Elegant Egotist". All three sisters then gained 500 ATK due to "The Seal of Orichalcos". Mai then activates "Harpie Lady Phoenix Formation" to destroy Joey's "Gilford the Lightning" and Sheep Token and inflict damage to Joey equal to the total ATK of his destroyed monsters. Later Joey's "Blue Flame Swordsman" (whose ATK was 2800 due to it being equipped with "Red-Eyes Black Dragon Sword") attacks and destroys one sister. Mai then destroys "Red-Eyes Black Dragon Sword" with "Harpie's Feather Duster". She then activates "Spell Reproduction" to return "Harpie Lady Phoenix Formation" to her hand. She then activates "Harpie Lady Phoenix Formation" to destroy Joey's "Blue Flame Swordsman" and inflict its ATK as damage to Joey, but Joey activates the second effect of "Blue Flame Swordsman" to transfer its ATK to the first sister in order to avoid taking damage from the effect of "Harpie Lady Phoenix Formation". Joey then uses the first effect of "Blue Flame Swordsman" to Special Summon "Flame Swordsman" from the Graveyard. Later the first sister (the one that gained the ATK of "Blue Flame Swordsman") attacks Joey's "Flame Swordsman", but Joey activates "Skull Dice" to roll a die and divide the ATK of the sister by the result. Joey gets a two, so the ATK of the sister is halved. The sister then destroys "Flame Swordsman". Mai prepares to attack directly with the other sister she has on her side of the field, but she finds herself unable to do so despite knowing full well that winning the Duel means Joey loses his soul. Regardless, Mai still wins the duel as Joey didn't have the energy left to continue the duel anymore.
In episode 184, this card appears in a flashback Mai has when she remembers ruthlessly using this card to wipe out a large amount of Joey's Life Points during their Duel in the alley and when she remembers "The Seal of Orichalcos" taking Joey's soul away.