Lucy is the Frontier Brain and law-keeper of the Battle Frontier's Battle Pike. Her costume is made to look like a Seviper, her signature Pokemon. She is the only character in the games to have the Trainer class Pike Queen.
Lucy "trampled flowers and braved storms" to reach her position. She is encountered at two and ten consecutive wins at the Battle Pike for the silver and gold Luck Symbol respectively. She isn't one for idle chatter, preferring to go right into battle. When she's defeated, she prefers her opponent to hurry and move along.
Lucy appeared in Queen of the Serpentine!. Before battling Ash (Yuri Lowenthal/Rica Matsumoto), she rescued his Pikachu from Team Rocket with her Seviper, defeating Jessie (Grey DeLisle-Griffin/Megumi Hayashibara R.I.P. Rachael Lillis) 's own Seviper in the process.
During the battle, Ash started off by using his Donphan against Seviper. For a while, Lucy seemed to have the upper hand despite the type disadvantage. However, Ash managed to turn the tables on the Fang Snake Pokemon by using Donphan's Rollout to counter Seviper's Flamethrower, knocking it out.
Lucy then sent out her Milotic, which easily defeated Donphan with a single Hydro Pump attack. Left with no other choice, Ash decided to use Pikachu. However, again, despite the type disadvantage, Lucy almost managed to defeat the Electric-type with a barrage of Hydro Pumps and Twisters. She even used Milotic's paralyzed state and had it strike Pikachu with a powered up Facade. Ash finally managed to defeat Milotic and win the match after he had Pikachu jump inside one of Milotic's Twisters to land a spinning Volt Tackle.
She reappeared in a flashback in A Pyramiding Rage!.
In the Legacy of Chris Thorndyke,
She will be voiced by Bebe Neuwirth in the English dub and Hitomi Shogawa in the Japanese dub as a tribute for Atsuko Tanaka.