The late, younger twin sister of Iria Akagami. Odette died in her teenage years, before Iria resided on Wet Crow's Feather Island. ~!Odette is said to have been killed by her sister Iria, though she firmly denies that she caused her death, despite her saying she killed her with her own two hands. Rather, Iria states her sister died on her own. The event was witnessed by many others, as Iria had killed Odette without warning, while others were watching. After the event, Iria went to Sparrow's Fetched Bamboo Mountain to lay low, until she was eventually led to Wet Crow's Feather Island.!~

Third ranking of the Killing Names of The Violence World, the Zerozaki Clan is infamous for their indomitable family unity. Each of its members exhibit combat prowess when it comes to saving one of their kin. Kishishiki Zerozaki is one member of the Zerozaki family, utilising a bat covered in nails to brutally murder his targets. He calls his weapon "Seamless Bias (Foolish Praise)". 
 
His next target was supposed to be just like any other target, though he was forced to bring Hitoshiki Zerozaki with him as a learning experience. It was supposed to be a standard mission, but now he faces a problem when he discovers that he has become prey to a formidable tactician and a ruthless berserker.

It's the vacation of a lifetime, a trip to a remote island filled with geniuses–and murder. 
 
On Wet Crow's Feather Island, a tiny speck in the Sea of Japan, lives Akagami Iria, the exiled daughter of a powerful family. Born into great wealth, she was a princess of the highest pedigree–until she was cut off by the leader of the Akagami Foundation. For the last five years, she's lived on Feather Island with her maids. But she hasn't been alone. She has invited the best minds Japan has to offer to come and stay with her. 
 
And so nineteen-year-old college student Ii-chan and his best friend, computer genius Kunagisa Tomo, find themselves as Iria’s guests at her elaborate mansion. Surrounded by fascinating women – a chef, a fortune-teller, a scholar, and an artist, not to mention his own friend Tomo – Ii-chan is feeling a little overmatched intellectually. But the sudden discovery of a grisly murder sends the island into shock. And Ii-chan discovers that he does possess a bit of genius: the ability to discover what is real and what is fake, who is who they claim to be and who is a killer. 
 
(Source: Del Rey Manga)

A dropout from an elite Houston-based program for teens is on a visit to a private island. Its mistress, virtually marooned there, surrounds herself with geniuses, especially of the young and female kind—one of whom ends up headless one fine morning.
 
(Source: Kodansha USA)

Let's commence the Zerozaki, cha.
 
The most crude and merciless demonic killers fight to the death.
 
The Zerozaki Clan is a family of demonic killers, ranked third among the Killing Names. Zerozaki Kishishiki, the user of a bat covered in nails known as "Seamless Bias (Foolish Prayer)". One after another, elite Killing Names enter the field. What lies at the end of this deadly battle? The forefront of new youth entertainment is here!
 
(Source: Kodansha, translated)

Odette Akagami