In the past, Iwana participated in a foreign espionage mission, where he was attacked and lost his left eye. In the anime, he and Bekkō were seen alongside Daikoku Funeno at the Academy, watching Itachi Uchiha getting attacked by bullies.
Iwana's attire is that of the standard Konoha shinobi complete with a flak jacket and a forehead protector which he wears like a bandanna. He also wears an eye-patch over his left eye.
Prologue — Land of Waves
Iwana was one of the many ninja who gathered to track down Naruto after he stole the Scroll of Seals from the Hokage's residence.
Akame (赤目) means red, or bloodshot eyes, possibly referring to his eye patch. It is also the Japanese name of the Japanese lates (Lates japonicus), a fish that is so rare and shy, it has received an almost legendary status among fishermen.
Iwana (岩魚、鮇) is also the name of a fish, or more specifically, of several species of fish from the Salvelinus genus, often called char or charr in English.