Volume 9 - Spark Out

Spark Out is the ninth volume of the Hidan no Aria novel series released on March 22, 2011. This novel concludes the Hilda arc.

Chapters

 * 1st Ammo - Spark Witch -Dracula Hilda-
 * 2nd Ammo - Magnificent Riko -Fii Bucuros Riko-
 * 3rd Ammo - Secret Rehabilitation -Boy Meets Girl-
 * 4th Ammo - Cultural Festival Day 1 -Carnaval Via-
 * 5th Ammo - Cultural Festival Day 2 -Carnaval Finale-
 * Epilogue - Go For The NEXT!! The G Bloodlines

Trivia

 * Spark Out is a reference to Hilda
 * Riko Mine briefly becomes a villain again in the story, but becomes good again after witnessing her friends, Kinji Tohyama and Aria H. Kanzaki, nearly get killed by Hilda.
 * Hilda is defeated by the trio of Kinji, Aria, and Riko similar to they way her father, Vlad, was defeated in Volume 3.
 * Elle Watson becomes the contract medic for Team Baskerville and starts her "Shock Therapy" sessions with Kinji to undo her male upbringings.
 * Cultural Festival takes place.
 * Tamamo explains more about what the Far Eastern Warfare (FEW) is about.
 * Kinji turns in his transfer documentation to begin the process of leaving the Butei.
 * GIII returns at the end of the volume, which also introduces GIV, who attacks Team Baskerville.