here the some facts from Amiko's biography :D I rewrite it... Amiko was born in a family of Midori. It has long existed a clan Midori. He was in Whirlpool Village Hidden in the Whirlpool (Uzushiogakure). Clan members have the Murasakigan - is dodjutsu which allows the user to create force fields roluprozrachnye to attack, movement and protection (something like Gaara's sand.) These fields are mostly flat or spherical, but you can do and more complex forms - it depends on the level of chakra and ninja skills. The eye color is changing to purple. The higher the expenditure of the chakras - the paler color of the iris and pupil. Midori clan had a good relationship with the Uzumaki clan. When in the course of World War the village was completely destroyed and the surviving members of the clan dispersed throughout the world. Hikaru Midori (Amiko's father) came to Konoha.