Miiko is cosplaying as Erio Towa from Denpa Onna to Seishun Otoko. Denpa Onna to Seishun Otoko is a Japanese light novel series written by Hitoma Iruma, with illustrations by Buriki. The series includes eight novels released between January 2009 and April 2011, published by ASCII Media Works under their Dengeki Bunko imprint. A manga adaptation started serialization in the October 2010 issue of ASCII Media Works's Dengeki G's Magazine. A 12-episode anime adaptation began airing in Japan in April 2011.
Erio is Makoto's first cousin. One day, she mysteriously disappeared for six months, with no memory of what happened during that time. At the same time, she began having an extreme fascination with aliens, believing herself to be an alien investigator monitoring humans. Following an incident where she broke her leg whilst trying to fly on her bike, she constantly wraps herself inside a futon.