Eruko (エルコ) is a character that has yet to appear in anything. She is a human girl and Nataka Kurokawa's former classmate.
Eruko has long wavy black hair with fair skin and gray eyes with white pupils. She wears a grey sweater over a black sailor fuku, black pleated skirt, black knee socks, and gray loafers.
Not much is known about her.
She and Nataka used to be classmates until she transferred to another school.
Up to this day, Eruko has only appeared in some of Deep-Sea Prisoner's Illustrations.
Nataka is Eruko's former classmate. She is also Eruko's love interest. They were shown holding hands together in one picture.
Niramigawa is possibly one of Eruko's classmates.
Jakotsuno is possibly one of Eruko's classmates.
Hitomi is possibly one of Eruko's classmates.
Sabaki is possibly one of Eruko's classmates.
- "Eruko" means "Passing through."