Also known as: 長瀞さん, 長瀞早瀬
Previously-original character created by 774 (Nanashi), now serialized into the manga Ijiranaide Nagatoro-San.
She's described as being S-dere (Sデレ), or Sadodere, a term for a character who gains pleasure by toying with and teasing their love interest. Frequently torments her senpai/boyfriend, Hachiouji Naoto. The game 774 made of her lists her under the name "Nagatoro Hayashi". She has a sister named Misaki and a brother named Taiga.