Eclair

Eclair is a character from La Pucelle: Tactics. She is the Princess of Paprika who is a close friend of Priere. She has a split personality known as Dark Eclair, who makes her first appearance in Chapter 4 of La Pucelle.

Signs of a Dark Knight appear around Cresson Castle, prompting La Pucelle to investigate at the behest of the Queen. They eventually find Eclair passed out. Alouette discovers that Eclair had retreated inside of her heart, prompting an alternate personality to take over, causing the disturbances. She teleports the party into Eclair's Heart, where it is revealed that Dark Eclair is a manifestation of Eclair's stress surrounding her pressured ascension to the throne by her mother and also from her desire to see the outside world. Alouette casts a spell that weakens Dark Eclair's hold over the original Eclair, essentially sealing her in the deepest depths of Eclair's heart.

Her mother is then told of Eclair's plight by Priere. She then allows Eclair to accompany La Pucelle in order to fulfill her daughter's wishes. In Chapter 12, Dark Eclair reappears again, forcing confrontation. However, La Pucelle defeats her in battle, prompting the original Eclair and Dark Eclair to make amends by agreeing to share Eclair's body.

Appearances
In La Pucelle, Eclair is able to change between her normal self and Dark Eclair at will. Dark Eclair has her own attacks, and both versions of her have an attack where she splits off from her other self and both double-team the opponent.

Disgaea 2: Dark Hero Days
Dark Eclair appears as downloadable content in the Japanese version of Dark Hero Days. Like Gig and Miabel, she was excluded from the North American release of the Downloadable Content for unknown reasons. She was re-included in the North American and European release of Disgaea 2 PC as an in-game character, along with all other DLC characters from Dark Hero Days.

Disgaea D2: A Brighter Darkness
Eclair appears in her normal form as a DLC character in Disgaea D2, with Dark Eclair making appearances in her special attacks.

Disgaea RPG
Eclair and Dark Eclair (via a skill) appear as a limited obtainable character during the La Pucelle: Tactics collaboration.

Trivia

 * Eclair and her dark form are a reference to Princess Gradriel, the main character of Princess Crown.