Crystal the Elemental Heroine

 is an American action-adventure-fantasy video game series, being developed by  (2005-2010) and  (since 2012) and published by  from 2005 until 2007 and Activision since 2009.

Synopsis
When a teenage girl learns that she is able to control all five of the elements as she deals with the threats that could cause the entire stability of the realms to collapse.

Games

 * 1)  (video game) (2005)
 * 2) Crystal and the Rise of the Ancient (2007)
 * 3) Crystal and the Rage of the Hybrid (2009)
 * 4) Crystal vs. Bloodgem (2012)
 * 5) Crystal: Nightmares (2015)
 * 6) Crystal: The Mallis (2017)
 * 7) Crystal and the New Elements (2019)
 * 8) Crytal: TBD (2021)

Spin-offs

 * 1) Crystal: Rhythm Stars (2010)
 * 2) Crystal: Rhythm Stars XL (2013)
 * 3) Crystal: Super Rhythm Stars (2016)
 * 4) Crystal Elemental Trilogy (2019)
 * 5) Crystal: Rhythm Stars Forever (2020)

Main

 * /Crystal Austin/ (voiced by Tara Strong) - a rather adventurous teenage girl who learns about being the chosen one to master all of the elements and to stop evil from rising.

Supporting

 * Luke Austin (voiced by Scott Menville) - Crystal's protective and rather serious older brother who is willing to teach her how to handle her elemental powers as he is TBD.
 * Jake Mortis (voiced by Jason Marsden) - a friendly and rather naïve teenager who Crystal has a crush on as he occasionally joins her in her adventures.
 * Carla Core (voiced by Cree Summer) - Crystal's fashionista best friend who is very friendly to her and helps her to fight evil, being implied that she might harbor feelings for her brother.
 * The Sage (voiced by David Kaye) - a wise sage who has chosen Crystal to become an elemental warrior as he is willing to show all his tricks and skills.
 * Trunk (voiced by Carlos Alazraqui) - the stupid spirit of Earth who is a stump and mastered everything related to the Earth.
 * Pyra (voiced by Susanne Blakeslee) - the wise and intelligent spirit of fire who mastered everything related to fire.
 * Soarus (voiced by Chris Cox) - the chill spirit of air who mastered everything related to air.
 * Raiyne (voiced by Catherine Taber) - the seductive spirit of water who mastered everything related to water.
 * Lex (voiced by Greg Ellis) - the slightly energetic and goofy spirit of electricity who mastered everything related to electricity.

Antagonists

 * Korra (voiced by Hynden Walch) - a vile witch who hails from the Dark Realm and wants to gain power of all of the elements as she tries to take control of everything.
 * The Ancient (voiced by Clancy Brown) - a sinister ancient being who plots to control all of life by reaching complete power over all elements and use them for his own evil purposes.
 * The Hybrid (voiced by Nolan North) - a TBD human-shadow hybrid who is searching for TBD.
 * Bloodgem (voiced by Kari Wahlgren) - a TBD dark elemental who is out to TBD.
 * Nightmare Crystal (also voiced by Tara Strong) - a dark reflection of Crystal's fears who wants to take control of Crystal's body and use it to cause mayhem TBD.
 * Mallis (voiced by TBD) - a TBD parasitic creature who is out to transform TBD.
 * Obsidian (voiced by Yuri Lowenthal) - a charismatic dark elemental who has formed five elemental monsters to steal the energy of the elements, forcing Crystal to find five new elements.

Comic book adaption
See Legend of the Elemental Heroine.

Trivia

 * The elements are fire, air, water, earth and electricity. And the five new elements are nature, TBD.
 * It's implied that Korra has a villainous crush on both Crystal and Jake.