Cynthia is a tall, and slender young lady with wavy knee-length creamy blonde long hair that has bangs covering her left eye. Her eyes are gray.
Diamond and Pearl series
She wears straight black leg trousers, a long black coat with a V neck and black fur rimming the cuffs and running down the end of the coat and a large teardrop-shaped ornament on the center of the coat, probably used as a fastener, she also dons a black top underneath. Her outfit is finished with black kitten heels and a yellow stripe on each shoes. For accessories she wore a large, black feathery ruff around her neck with two hair clips in her hair, both resembling two teardrop-shaped object conjoined with a pale yellow stripe.
Black & White series
Cynthia wears a blue top that has a medium-sized collar, a teardrop-shaped object, a blue ribbon tied on her waist and she wears open-toed heels.
Cynthia has an overwhelmingly strong and independent personality. Always up for a good challenge, she isn't one to hold anything back, as seen in her multiple battles throughout the series. It is also clear that she wants to help other Trainers grow and expand bonds with their own Pokémon. Despite being clear during battles and Pokémon treatment, she can be indecisive when it comes to sweets such as ice cream.
She also assists Ash and the group when they are trying to stop criminal organizations such as Team Galactic and later Team Rocket who wants to conquer the Unova region by using Meloetta and the legendary Kami trio.
Pokémon the Series: Diamond and Pearl
When the heroes encountered Lucian, the latter told them that he, along the rest, were members of the Elite Four. He reminded that they were powerful Trainers, who had to be defeated in order to challenge the Champion, Cynthia. Lucian later challenged Cynthia, whose Garchomp easily defeated his Bronzong.
Elsewhere, Cynthia was trying to decide on an ice cream flavor. She then wanted all of the flavors, annoying Team Rocket (who posed as ice cream salesmen). She studied a rock for a bit, until Paul approached her. Paul wanted to battle her, which Cynthia complied to, seeing he wanted to challenge the Sinnoh League. Paul sent his Murkrow, Weavile, Chimchar and Torterra, and only the latter dealt a blow on Garchomp with Frenzy Plant. However, Garchomp quickly defeated all four Pokémon, before Paul surrendered the match. Regardless, Cynthia believed this to be a good match, and reminded him to heal his Pokémon. Since Nurse Joy was busy with other tasks, Cynthia healed Paul's Pokémon. She noted they were in a great shock, as she gave them a pill and some water, but noticed they were all well-trained.
As Paul and Ash were arguing, Cynthia took them to the rock she studied a bit earlier. She showed an inscription on the rock: "When every life meets another life, something will be born." She admitted she also wanted to become stronger, and was why she met a lot of people and Pokémon to achieve that goal, to learn much from others. It was why she also wanted to meet Dialga and Palkia, too. After Chimchar got taken by Team Rocket, Paul quickly retrieved his Chimchar back, but was advised by Cynthia to spend a night at the Pokémon Center to look after it. She bid farewell to the group, as she went to Celestic Town to see the Adamant Orb. Paul had Chimchar fight Garchomp under these hard conditions to bring out its power, by activating its Blaze ability. Encountering Paul once more, Paul confronted Ash about entering the Wallace Cup. Ash and Brock reminded him about Cynthia's words, and asked him what did those words mean to him, but Paul did not want to elaborate.
Cynthia went to Celestic Town, where she met up with her grandmother, Prof. Carolina, who studied the Lustrous Orb. She also met up with the heroes before Cyrus arrived, posing as a businessman of an industrial complex. They first inspected a giant slab, depicting three Mythical Pokémon, two of which Ash and Dawn identified as Mesprit and Azelf. Cynthia and Carolina were in shock that they knew of these Pokémon, and were told they encountered them already on Lake Verity and Valor. Cynthia described the third Pokémon to be Uxie from Lake Acuity, and her grandma felt that these Lake Guardians also protected humanity.
As Team Galactic triggered an explosion at the ruins, everyone was in distress until Team Galactic's forces surrounded the laboratory. Cynthia realized the explosion was a distraction, so she sent Garchomp to battle Saturn's Bronzor, leaving the rest to protect the Orb. However, Saturn threatened to hurt them if the Orb was not handed to them, to which Cynthia went to send another Pokémon to defend herself. Her Garchomp and Gastrodon retaliated against Mars' Bronzor and Saturn's Toxicroak's attacks. After Team Rocket escaped with the Lustrous Orb, the group rejoined at the Pokémon Center, where Cynthia reminded them about the importance of Lustrous and Adamant Orbs, being tied to Palkia and Dialga.
Ash was still upset to see Chimchar wounded from the attacks, but Cynthia explained he had to look to the future, instead of feeling guilty over past mistakes. As Team Galactic captured the Lustrous Orb, Cyrus later rejoined Cynthia and others, who felt guilty about letting the enemy take the Orb. Cyrus claimed they had no reason to feel guilty, as they did their best to protect the Orb. The next day, Cynthia nevertheless thanked the heroes for their help, before receving a letter of a battle challenge. The heroes wondered what they could do next about Team Galactic, to which Cynthia felt that they would be prepared for their next attacks. Upon meeting up with Aaron of the Elite Four, the heroes realized this was the challenger that had sent Cynthia the letter.
Aaron, facing Cynthia, used Drapion to battle her Garchomp. Moments later, Cynthia's Gastrodon defeated Aaron's Beautifly and earned Cynthia the victory. While Ash faced Paul in a full battle, upon seeing Chimchar confident, Brock was reminded of Cynthia's words. He felt that Chimchar played a key part between the two rivals, as noted by Cynthia. As Team Galactic was capturing the Lake Trio Pokémon, Cynthia had the heroes enter her car as they went to stop the enemy. She informed them they were to meet Looker, who was investigating activities at Mt. Coronet. She was also aware that Team Galactic attempted to take control over Dialga and Palkia. However, the powers of the Lake Trio warped the heroes away from Cynthia's car to Team Galactic HQ, to rescue them. Seeing a helicopter of Team Galactic flying to Mt. Coronet, Cynthia decided to go there, following them near the gateway to the Spear Pillar.
While the other superiors of Team Galactic went through the portal, Cynthia had Garchomp bind Jupiter by surprise, knocking out her Skuntank, and restrating Jupiter herself. After Cynthia freed the hostages, they went after Cyrus, and his other two Commanders, Mars and Saturn. As Cyrus used Dialga and Palkia to open a new world, Cynthia had the heroes attack the Red Chain to free the Legendary Pokémon. In the end, Cynthia apprehended the Galactic Commanders, after Cyrus was lost in the world that was destroyed by Dialga and Palkia. Before departing, Cynthia reminded the heroes that the Lake Trio chose them to bond with because they cared about Pokémon a lot. She bid them farewell, reminding that they saved the Sinnoh region.
Flint remembered Cynthia and her Garchomp, having grown courage to face them in battle. Cynthia attended the Sinnoh Pokémon League competition with President Charles Goodshow, watching the competition from the audience with President Goodshow. She stopped by a stand run by Team Rocket (in disguise), but was unsure what to eat. At the end of the day, she noticed that in the next round, Ash would have to face his rival, Paul. Cynthia watched Ash and Paul's battle, noticing the former's Infernape evolved since it was Paul's Chimchar. She continued to watch their battle, and once Ash won, she noticed he was gone. She went to his friends, thinking that he went to meet up with Paul for one final time. She then watched the semi-final match between Ash and Tobias.
The heroes watched Flint's Infernape battle against her Garchomp's powerful Stone Edge on live television. Ash enjoyed watching the battle and became determined to become a stronger trainer who will defeat the Champion someday.
Pokémon - Zoroark: Master of Illusions
Cynthia was seen battling against Palmer's Milotic with her Garchomp.
Pokémon the Series: Black & White
Cynthia met Ash once again in Unova, and was introduced to his new friends, Iris and Cilan. She told them of the Pokémon World Tournament Junior Cup. Upon learning of it, the three of them decided to come with Cynthia and participate. On the way to Cynthia's villa, she almost hit an injured Meloetta with her car, but stopped in time. She figured out it was suffering from a fever and gave Ash, Iris, and Cilan instructions on how to make it feel better. She asked Iris and Cilan to find a berry for her while she and Ash find some ice. Upon reaching a river, she was revealed to have a Glaceon, which she commands to use Ice Beam to freeze the water.
They broke the ice and took it to Meloetta, to have it recover. She then received a telephone call, asked to return to Virbank City. After it recovered a little, Iris asked Cynthia if she could battle her and her Garchomp while she used Axew. She agreed, and the battle got underway. Even though Axew learned Giga Impact during the battle, Garchomp proved to be way too strong for Axew. Cynthia stopped Garchomp from attacking and ended the battle before Axew could get hurt. Later, when boarding the plane destined for eastern Unova, Cynthia advised Ash that someone he knew was expecting them at her villa at Undella Town.
Ash and his friends arrived in Undella Town, the location of Cynthia's villa. On their way, they saw certain Pokémon, which Cynthia described them to have originated from other regions. At the villa, which Cynthia used for vacations, Ash was reunited with Dawn for the first time since his journey in the Sinnoh region. After that, Cynthia watched the battle between Dawn and Cilan. Cynthia went with the heroes to the site of the Junior Cup tournament. She was seen talking with Alder, who tried to charm her. She also met Trip for the first time and later participated in an exhibition match between Caitlin, whom she had known before. Using her Garchomp against Caitlin's Gothitelle, neither side won, but Cynthia praised Caitlin's skills. This battle was followed by the beginning of the Pokémon World Tournament Junior Cup. Cynthia helped Iris with Dragonite's disobedience. She managed to pet him and told him to relax, seeing it was not comfortable being around humans.
She later ran into Trip and was surprised he wasn't watching the matches. Trip assured her he already planned his strategies against his opponents, surprising her with his confidence, to which she wished him luck. She continued to watch the battles, seeing if Dragonite started to listen to Iris, the team would become very powerful. She observed Iris and Ash's battle in the second semi-final match and while everyone was convinced Dragonite began to listen to Iris, Cynthia knew he was going by instinct. After Iris lost, Cynthia revealed to everyone that Dragonite doesn't fully trust Iris yet and witnessed Ash's loss to Trip. She then watched Trip battle Alder and the former lost to the champion. She would later referee Ash and Dawn's battle, noting that the children showed great prowess through their journies. She eventually stopped their battle, seeing it didn't matter who won, as both Ash and Dawn were strong. She later saw Dawn off as she traveled to Johto.
Cynthia went away on business and learned from Jervis that Meloetta was training with Ash. She replied to him she'd be returning soon. When she did, Ash, Pikachu, and Meloetta have already been captured by Team Rocket and taken to the Abyssal Ruins. She asked Ridley, who was protecting Meloetta, about the latter's power. Cynthia, Ridley, Iris, and Cilan were traveling by boat to the Ruins. She sent out Garchomp to battle the Forces of Nature: Landorus, Thundurus and Tornadus. She saw Iris protect Dragonite, which strengthened their bond and allowed him to obey her. After Team Rocket retreated, Cynthia stated there were people who would fight back, as their desire was not to conquer. She hoped one day all people would hear Meloetta's song, which made her happy. She later bid Ridley and Meloetta farewell as they departed to go back into hiding once more with the rest of Ridley's fellow guardians. Cynthia and Jervis advised Ash that the Unova League would take place in Vertress City, and advised them to go past Opelucid City. Cynthia and Jarvis wished Ash luck before he, Iris and Cilan left.
- Italian: Alessandra Karpoff
- Hebrew: Liat Har-Lev
- Brazilian: Samira Fernandes (DP040)/Cláudia Carli (DP043)/Elisa Villon (DP096-present)
- ^ DP035: An Elite Meet and Greet!
- ^ DP040: Top-Down Training!
- ^ DP051: Glory Blaze!
- ^ DP081: Chim - Charred!
- ^ DP096: Losing Its Lustrous!
- ^ DP097: Double Team Turnover!
- ^ DP099: A Trainer and Child Reunion!
- ^ DP100: Aiding the Enemy!
- ^ DP131: Pedal to the Mettle!
- ^ DP151: The Needs of the Three!
- ^ DP152: The Battle Finale of Legend!
- ^ DP180: Four Roads Diverged in a Pokémon Port!
- ^ DP182: An Old Family Blend!
- ^ DP183: League Unleashed!
- ^ DP185: Working on a Right Move!
- ^ DP186: Familiarity Breeds Strategy!
- ^ DP187: A Real Rival Rouser!
- ^ DP188: Battling a Thaw in Relations!
- ^ DP189: The Semi-Final Frontier!
- ^ DP191: Memories are Made of Bliss!
- ^ MS012: Pokémon - Arceus and the Jewel of Life
- ^ BW087: All for the Love of Meloetta!
- ^ BW088: Piplup, Pansage and a Meeting of the Times!
- ^ BW092: Jostling for the Junior Cup!
- ^ BW093: Battling Authority Once Again!
- ^ BW094: Ash, Iris and Trip: Then There Were Three!
- ^ BW095: Goodbye, Junior Cup - Hello Adventure!
- ^ BW098: Meloetta and the Undersea Temple!
- ^ BW099: Unova's Survival Crisis!
- ^ BW100: Beauties Battling for Pride and Prestige!