Rune Iwasaki
About
A girl whom Kouta met at a manga cafe after leaving his home following an argument. Like Kouta, she too, is a fan of Ozma's works.
It is later revealed that she is the Chief of Ozma Studio, a fellow manga author, and the Art Director and author of Revolution x2 (also known as Revo Revo), one of Ozma's works.
(Source: Wikipedia)