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Juniper "June" Kim Lee (voiced by Lara Jill Miller) is the protagonist of the series. Juniper is a feisty 11-year-old Chinese-American girl who lives in Orchid Bay City and is the current Te Xuan Ze. Juniper is relatively uneducated in the world of magic, mostly relying on her superhuman strength, the advice of her grandmother Ah-Mah, and her enchanted dog Monroe to defeat her foes. She has long black hair, in which a white streak appears once she inherits the powers of the Te Xuan Ze; she later dyes the streak reddish-pink. The juniper flower symbolizes protection, referring to Juniper's role as the Te Xuan Ze, protecting others.
Jasmine Lee (voiced by Amy Hill) – Jasmine Lee or "Ah-Mah" (Chinese: 阿嬤; pinyin: Ā-mā; lit. 'grandma') as Juniper calls her, is Juniper's grandmother, and the previous Te Xuan Ze. Calm and deliberate in most respects but crude and tough when she needs to be, the 69-year-old assists June when she is in serious trouble. In the episode "Monster Con", Ah-Mah is shown to still possess a degree of magically enhanced speed and strength, though her stamina and durability are severely diminished to the point of being unable to stand unassisted after two to three minutes of combat.
Ray Ray Lee (voiced by Kath Soucie) is Juniper's hyperactive, dim-witted 8-year-old little brother. Like Juniper, Ray Ray can see through the magic barrier, though this is not a naturally occurring ability. When Juniper first gained her powers, a group of demons attempted to drain her powers. Ray Ray unwittingly intervened, causing some of her powers to transfer to him. He is hyperactive and careless, and often gets himself into trouble when dealing with the magic world. He also has a sibling rivalry relationship with Juniper, although it is often seen that he cares for her deeply. In the episodes after "O Brother, What Art Thou?", Ray Ray is a homunculus, his mind having been transferred to an artificial body after he accidentally mutated his original body into a dinosaur-like creature.
Monroe Connery Boyd Carlyle McGregor Scott V (Monroe for short, voiced by Carlos Alazraqui) is an enchanted pug of Scottish origin. He is quite educated in the world of magic, having been alive for several centuries and assisting each Te Xuan Ze. Monroe has been magically enhanced, allowing him to be understood by those who can see through the magic barrier.
Dennis Lee (voiced by Alexander Polinsky) is Juniper's grumpy, cynical 15-year-old elder brother who does not take June or Ray Ray seriously and usually calls them names. He loves manga and video games, and does not like anyone touching his stuff. In "Sealed With a Fist", Dennis learns that his sister is the current Te Xuan Ze and has grown to trust June after they work together with Boomfist and H.A.T.E. (Heroes Against Terrible Evildoers) to defeat L.O.V.E. (League of Villainous Evildoers). After that, he starts helping Juniper and Ray Ray on occasion.
Jody Irwin (voiced by Colleen O'Shaughnessey) is Juniper's best friend and usually the happiest of the group. She tries her best to cheer the group, even in the most ridiculous of ways.
Ophelia Ramírez (voiced by Candi Milo) is one of Juniper's friends. She is a grumpy, cynical Latina goth emo girl with pinkish-purple colored hair. She doesn't like a lot of things (such as girly stuff) and especially hates Roger. When she is in charge, she wants everything done perfectly.
Roger Radcliffe (voiced by Tara Strong) is one of Juniper's friends and the school's class clown, he has unpredictable tendencies and he constantly asks Ophelia to go on a date, which she refuses. He has been known to imitate famous people or songs in the most crude and ridiculous of ways. His family is eventually revealed to be wealthy, but he has never even come close to becoming spoiled, due to his cheerful personality.
