Erio Touwa is Makoto Niwa’s first cousin, and Meme Touwa’s daughter. One day when coming home from school she mysteriously disapeared for six months. Only to be found floating in the sea with no memories of what had taken place. She began having an extreme fascination with aliens, believing herself to be an alien investigator monotoring humans. Following an incident whilst trying to fly on her bike where she broke her leg, she started to constantly wrap herself in a futon.