Éclair Tonnerre is an anime-only character who appears in Ep 25 - The Host Club Declares Dissolution! and Ep 26 - This is Our Ouran Fair!. She is an elite wealthy French heiress to the French company, Grand Tonnerre Group, whose modern-day fortune is based in Finance and Business Management.
AppearanceÉclair is a slender, pale-skinned young woman with long chestnut-brown hair and vibrant blue eyes. She often carries a pair of opera glasses with purple lenses, which she uses when she wants to see someone more clearly who is far away or when she is speaking with someone nearby, using them as a physical barrier. She always wears "fancy" clothes, even in casual appearances, indicative of her noble birth.
Éclair is a mysterious and strange young woman whose actions are a facade. Her general demeanor is cold, haughty and manipulative. Her behavior is rude towards the Host Club as a lot, especially to Haruhi Fujioka of whom she is jealous. Her age is unspecified.
Tamaki's grandmother, Shizue Suoh, knowing that Éclair and her family has the ability to buy out the Suoh holdings, seeks to align their families by arranging an engagement between the two young heir apparents. Tamaki agrees when he is told he will be allowed to see his mother again if he marries Éclair.
At the conclusion of the anime and in a dramatic turn of events, Éclair releases Tamaki from his obligation because she has come to understand both his heroic nature and his underlying love for Haruhi, who is in danger at that moment. Tamaki thanks Éclair for understanding his choice. Though she thinks him a fool, Éclair's final voiceover notes that Tamaki still smiled for someone like her, thus acknowledging her shortcomings and redeeming herself.
In the manga, Anne-Sophie is a piano teacher and Éclair does not exist.
- In French, éclair means "lightning" and tonnerre means "thunder." "Éclair Tonnerre" literally means "lightning thunder" or, if said in traditional Japanese format as "Tonnerre Éclair" - thunder and lightning. Haruhi's fear of thunder is a play on words reflecting her state of being following Éclair's arrival.
- An éclair is also a pastry, called so because it is usually eaten quickly. This is possibly a reference to the fact that Éclair is introduced in the penultimate episode and shown leaving in the final one.
- (Referring to Tamaki Suoh) He's such a fool.
- (Commenting on the Ouran Academy's student art gallery) How pedestrian.
- (To Anne-Sophie de Grantaine) Is he really that handsome like you said?
- (To Tamaki) Play the piano for me, Tamaki.
- Even so, even for someone like me, he still smiled...