Aoi Nishimata is a Japanese visual novel character designer and illustrator who works for Navel.
Hiro Suzuhira and Aoi Nishimata have known each other from high school; their first work, Ritual, was introduced in 1996. In 2003, she joined Navel along with Hiro Suzuhira, illustrating Shuffle!. She then went on to make Really? Really! and Oretachi ni Tsubasa wa Nai.
(Source: Wikipedia)
Twitter: @aoi_nishimata