Aiber (アイバー Aibā), whose real name is Thierry Morello (Tierry Morrello (ティエリ・モレロ Tieri Morero) in the Japanese version), appearing in the anime and manga, is a professional con man in the employ of L. He plays the role of Eraldo Coil (エラルド・コイル Erarudo Koiru), one of L's detective aliases, during the investigation of the Yotsuba Group. Aiber uses his initial "A", just like L, when communicating through computers. Aiber speaks many languages and uses many false identities. "Supposedly" he has a talent for using his "good looks" to convince women to pass information to him. Aiber enjoys "life on the edge" and his "biggest thrill" comes from conning people. Since he is a professional criminal, he is known solely in the underworld.
After L's death, in the manga Light kills him using the Death Note. Aiber dies from liver cancer at a hospital in Paris, France with his family at his bedside. In the anime, he dies of a heart attack in front of his wife and son. He is voiced by Takuya Kirimoto in the Japanese anime, and David Orth in the English version. He (like Wedy) is referenced to, but does not appear in, Death Note: Another Note.
Ohba said that he created Aiber and Wedy so he could use characters with "special abilities" to advance the storyline. He said that Aiber "did some things."
According to Obata, his editor told him that Aiber was a "sarcastic, comic relief" character. Obata said that he wishes that he could have drawn Aiber to be "more comedic." Obata believes that if he drew Aiber and Wedy to look "a little bit more original", Ohba could have included the characters in a larger role in Death Note.