Niramigawa (睨見川) is a character that has yet to formally appear in anything. She is a human girl and appears to go to the same school as Elco.
Niramigawa's hair is styled in a bob style with an ahoge (cowlick). Her eyes are black, and she wears red framed glasses. Her school uniform consists of a black sailor fuku topped with a gray sweater, and a black pleated skirt. She wears white socks with a pair of dark gray loafers.
Niramigawa is said to be calm and cool. She is Jakotsuno’s best friend.
Not much is known about her.
Up to this day, Niramigawa has only appeared in one of Deep-Sea Prisoner's sketches.
Jakotsuno is one of Niramigawa's classmates. She is also Niramigawa's best friend.
Elco is possibly one of Niramigawa's classmates.
Hitomi is possibly one of Niramigawa's classmates.
Sabaki is possibly one of Niramigawa's classmates.
- Her name means "Scowling Idea River / Visible Power River."