Crystal the Elemental Heroine

 is an American action-adventure-fantasy video game series, being published by  from 2005 until 2008 and  since then.

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)

Spin-offs

 * 1) Crystal: Rhythm Stars (2010)
 * 2) Crystal Elemental Trilogy (2019)
 * 1) Crystal Elemental Trilogy (2019)

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 TBD older brother who is willing to teach her how to handle her elemental powers as he 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 TBD 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 TBD.
 * Trunk (voiced by TBD) - the stupid spirit of Earth who is a stump and TBD.
 * [spirit of fire, male or female, how to represent]
 * [spirit of air, male or female, how to represent]
 * [spirit of water, female, how to represent]
 * [spirit of electricity, male or female, how to represent]

Antagonists

 * Korra (voiced by Hynden Walch) - a TBD witch who hails from the Dark Realm and wants to gain power of all of the elements as she tries to take control TBD.
 * 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 TBD.
 * Bloodgem (voiced by TBD) - a TBD dark elemental who TBD.

Trivia

 * The elements are fire, air, water, earth and electricity.
 * [give the characters a new design, for the remastered trilogy and onwards or a bit earlier]