Aiber

Aiber (アイバー, Aibā), is a professional con-man in the employ of L.

Character
Aiber is a professional con man that has the special ability to blend in with various types of social groups. Having this ability, he is able to build trust within individuals, and then extract information from them.

Plot
Aiber plays the role of Eraldo Coil, 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 doesn't like the idea of guns and using them, but when they're after Higuchi, he fires a shot at Higuchi's head (and misses). In the manga, after L's death, Light Yagami writes Aiber's real name in the Death Note. Aiber dies of liver cancer in a hospital in Paris, France with his family at his bedside. In the anime Aiber suddenly dies in front of his family (probably from a heart attack as only his name was shown to be written in the Death Note).

Conception
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.

Trivia

 * The fact that his real name is Tierry (a misspelling of "Thierry") and that he died in France with his family suggests that he is in fact French. He is also seen staying near the famous landmark known as the Arc de Triomphe in Paris during his call to the Yotsuba Group. The surname Morrello is Italian but he may be of Italian descent.

Thierry Morello
 * Aiber hates guns and only reluctantly handles one when Higuchi flees the TV studio after firing at Soichiro Yagami.