The Queen of Light, which was hit by a ray of dark energy, returns to her original shape, divided into three parts: the life, the heart (i.e the throne of the Queen) and the twelve Hearts of Magic, which represent her aspirations.
So, Nagisa and Honoka become the legendary warriors, Pretty Cure again to find all the pieces of the Queen and prevent the Evil King from awakening. They are then joined by Kujou Hikari, who transforms into Shiny Luminous, who is the very life of the Queen of Light.
- Misumi Nagisa (美墨なぎさ Misumi Nagisa?): Nagisa is the athletic heroine of the series. She is the captain of the school's lacrosse team and is very popular. Although she is bad at school and is immature, she has her own sense of justice and never lets anyone dear to her down. She's a scatter-brained glutton who loves Akane's takoyaki. Her alter ego is Cure Black (キュアブラック Kyua Burakku?).
- Yukishiro Honoka (雪城ほのか Yukishiro Honoka?): Honoka is the best student in the class, and loves reading books and science. She is the president of the Science Club. Though popular with the boys, she has no interest in them and is rather asocial in a formal manner. However, the friends that she does have are very close to her, and she will do everything to protect them. She has a lot of hope and can always see the good in people. She lives with her grandma since her parents travel a lot. Her alter ego is Cure White (キュアホワイト Kyua Howaito?).
- Kujou Hikari (九条ひかり Kujou Hikari?): A mysterious girl who is later revealed to be the life of the disappeared Queen. She is a warrior that has special powers that aid the girls while fighting. Hikari is sweet and gentle and always thinks of others. She works with Akane at the Tako Cafe. Her alter ego is Shiny Luminous (シャイニルミナス Shaini Ruminasu?).
- Mepple (メップル Meppuru?): The chosen protector of the Princess of Hope, and is in Nagisa's care. He is quite arrogant and constantly argues with his caretaker, but he loves Mipple, and they are often seen having a "lovey-dovey" relationship. He ends his sentences with "-mepo".
- Mipple (ミップル Mippuru?): The Princess of Hope, and also in Honoka's care. Unlike Mepple, she is reserved and seems to get along well with her caretaker, but she still cares very much for him. She ends her sentences with "-mipo".
- Pollun (ポルン Porun?): The Prince of Light who is sent to be with Pretty Cure in the second half of the first season. He is extremely selfish and usually only thinks of himself. He lives with Nagisa and annoys her and Mepple to a great extent until Hikari takes him in in Max Heart. He has mysterious powers that give the girls the Rainbow Bracelets so that they can perform the Rainbow Storm attack. He ends his sentences with "-popo". He is also the transformation device for Hikari to transform into Shiny Luminous.
- Lulun (ルルン Rurun?): The Princess of Light who can connect with the future. She lives with Hikari and Pollun. She thinks of Pollun as her older brother and always annoys him. Lulun can give the Heartiel Brooch to Shiny Luminous. She ends her sentences with "-lulu".
- Zakenna (ザケンナー Zakennā?): The physical form of the Dotsuku Zone's power. They infect items or people's shadows to turn them evil. When defeated, they turn into little black stars shouting apologies while running away.
- Circulas (サーキュラス Sākyurasu?): He appears to be the leader of the Four Guardians whenever Baldez is not around. He has long blonde hair and blue eyes with white skin.
- Uraganos (ウラガノス Uraganosu?): He is the large and dim-witted member of the group. He is clumsy and tends to destroy things by accident due to his size and strength. He has a pirate-like mustache, red skin, and a bandanna.
- Viblis (ビブリス Biburisu?): She is the more serious member of the group. She often scolds Uraganos and Circulas when they argue and is more intimidating. She has short yellow-orange hair and pinkish skin. She is the only female member.
- Baldez (ヴァルデス Varudesu?): The strongest of the Four Guardians. He can repel the Marble Screw Max, Heartiel Action and Extreme Luminario attacks. He has black hair and pale skin.
- Evil King (ジャアクキング Jākukingu?): The resurrecting ruler of the Dotsuku Zone, and also the series' main antagonist. He is made of darkness and has red glowing eyes, with long arms with chains. After being killed by Pretty Cure in the original series, he is going through a resurrection and is after revenge.
- Kujou Hikaru / The boy in the mansion (九条ヒカル / 館の少年 Kujou Hikaru / Yakata no Shounen?): The "life" of the Evil King while going through resurrection. At first, he is just a small boy who likes to play. As the series progresses, though, he becomes quieter and stares out at the window.
- Heartiels (ハーチイエル Hāteieru?): The twelve Heartiels represent the Queen's embodiment of will. They all represent different moral qualities, such as intelligence and harmony.
- Queen (クイーン Kuīn?): The queen of the Garden of Light. She is a huge woman, whose height is only rivaled by that of the Evil King. She disappears at the beginning of the series, and her life is represented by Hikari. She has long, golden hair and a pale face.
- Wisdom (ウィズダム Wizudamu?): Wisdom is the mysterious guardian of the Prism Stones and he watches from afar. He is pulled out by the villains in their attempts to capture the stones and defeat Pretty Cure.
- Elder (長老 Chōrō?): A wise sage who resides in the Garden of Light. Despite his wisdom, he often keeps forgetting Nagisa and Honoka's names and referring to them as the Pretty Cure.
- Heartful Communes - The new transformation device used by Black and White.
- Touch Commune - The transformation device for Shiny Luminous.
- Miracle Commune - The small laptop device for Shiny Luminous.
- Heart Baton - The weapon used by Shiny Luminous.
- Heartiel Brooch - An upgrade tool used by Shiny Luminous.
- Sparkle Bracelets - The two upgraded bracelets used by Black and White
- Garden of Hope (希望の園 Kibō no Sono?): Only appears in Futari wa Pretty Cure Max Heart: The Movie.
- Garden of Clouds (雲の園 Kumo no Sono?): Only appears in Futari wa Pretty Cure Max Heart 2: Yukizora no Tomodachi.
- Garden of Rainbows (虹の園 Niji no Sono?): The term used by Mepple that refers to the Earth.
- Garden of Light (光の園 Hikari no Sono?): The world where Mepple, Mipple, Porun, and Lulun come from. The Garden of Light is protected by the power of the Prism Stones. It is daylight all the time and flowers bloom all year long. Also, time works differently here than in the Garden of Rainbows. Mepple and Mipple had visited the Garden of Rainbows 100 years before the start of the 1st season. From their point of view, however, the 100 years that had passed was merely a single day.
- Verone Academy (or Verone Academy Junior High School): Nagisa, Honoka and Hikari's school.
- Kappa Mountain and Lake Hyoutan: The places where Mepple dropped the Prism Hopeish into. The outline of the lake looks like a figure eight. In Max Heart, the Pretty Cure went to the same place to find a piece of shining earth that "contained great power of hope which was surrounded by six pillars" in Lake Hyoutan.
- Tako Cafe: Fujita Akane owns and operates the tako cafe.
- Like the first season, an English dub of Pretty Cure: Max Heart was broadcasted in Singapore in Mediacorp Central's Kids Central programming block, starting in August 2007. It was never released on DVD or broadcasted elsewhere. The only known information are some of the episode titles and the names of some voice actors.
- Futari wa Pretty Cure and Futari wa Pretty Cure Max Heart have signature positions that are referenced in the All Stars franchise. Cure Black and Cure White's jump with smoke behind them is seen in:
- Pretty Cure All Stars DX: Minna Tomodachi - Kiseki no Zen'in Daishuugou! opening.
- Pretty Cure All Stars DX 3: Mirai ni Todoke! Sekai wo Tsunagu☆Niji-Iro no Hana when they escape the scattered and recombined Fields.
- Pretty Cure All Stars New Stage: Mirai no Tomodachi Trailer.
- Cure Black and Cure White's iconic wall pose is also referenced in Pretty Cure All Stars New Stage: Mirai no Tomodachi.
- Like its predecessor, Futari wa Pretty Cure Max Heart had a special Audio Drama created, teaming up the heroines with the then-current Super Sentai series. This time, it was with Mahou Sentai Magiranger.
- The Max Heart team is depicted as the strongest Pretty Cure team (at least within the All Stars universe), as they are often put against the larger and more powerful enemies outside of the main villains and being called in to deal with situations that even two other teams combined couldn't handle (the boat in the first New Stage movie).
- Main article: Futari wa Pretty Cure Max Heart Merchandise
- Futari wa Pretty Cure Max Heart at Toei Animation (Japanese)
- Futari wa Pretty Cure Max Heart at Anime News Network's Encyclopedia
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