Katsumi Nakase

Katsumi Nakase (中瀬 克実, Nakase Katsumi), who goes by the cosplay name Fubuki, is a side character in Steins;Gate 0 who was first mentioned in Steins;Gate. She is a second year high school student, a cosplayer and a friend of Mayuri Shiina and Kaede Kurushima. On at least one of the Alpha World Lines, she helps out at MayQueen+Nyan² as a waitress after Mayuri's death.

Appearance
She has short, light brown hair styled in a fringed bob hairstyle and brownish eyes. She typically wears a bright-yellow jacket with a black zigzag pattern on its sleeves over a beige hoodie which she seems to wear over a pink shirt.

Personality
Fubuki is described as boyish and athletic. She frequently flirts with Mayuri and often has perverted thoughts about her, but does not like being compared to Itaru Hashida and becomes gloomy at the thought of likening him.

Background
She met and became friends with Mayuri Shiina at an event, who would proceed to sew cosplay outfits for her. On one occasion, Fubuki cosplayed as a male character and received more attention from a female audience than a male one. In 2009 she cosplayed as Seira Orgel from Blood Tune (a fictional anime series from the visual novel Chaos;Head), which Mayuri thought looked really sexy.

Steins;Gate
On August 13, on some Alpha World Lines, Mayuri meets up with Fubuki at a Starbucks to fix a loose thread on the costume Mayuri had sewn.

Steins;Gate 0 (visual novel)
Fubuki is one of several who contracts the new encephalitis disease, i.e. develops a higher degree of Reading Steiner. As a result of this, she begins to have flashbacks to Mayuri's many deaths in the Alpha Attractor Field and later of World War III occuring earlier on one of the Beta World Lines.

During the Future Gadget Lab's Christmas party, she and Rintaro Okabe both collapse as the world line changes to one where World War III has begun earlier than Suzuha foretold and where the Soviet Union still exists. A man by the name of Shimoyama interrogates both her and Okabe, tricking both of them into revealing that they know of an alternate world line where the USSR had not fallen.

After the world line changes mysteriously once again, Okabe discovers that Fubuki is still hospitalized after collapsing from Reading Steiner's effect on her body, so he, Mayuri, and her friends go to visit her. While there, Okabe confides in Fubuki the secrets of Reading Steiner and world lines, which Professor Alexis Leskinen later learns from her. It is heavily implied that Professor Leskinen brainwashed Katsumi to obtain this information.

Trivia

 * Due to her boyish appearance, Katsumi is better known for cosplaying male characters than female ones.

Etymology

 * The name Katsumi means "overcome" (克) (katsu) and "fruit, good result, truth" (実) (mi).
 * Katsumi's surname Nakase means "middle" (中) (naka) and "swift current, rapids" (瀬) (se).