Kōsuke Shirai (白井 コースケ, Kōsuke Shirai?) is Ataru Moroboshi's classmate and best friend, excluded from the Anime in favor of Lum's Stormtroopers.

About

Kōsuke is Ataru and Hokuto's best friend and the three of them are often seen causing trouble together. He has a girlfriend (who was willing to pose as "Shinobi Nobade" for him), and has received Valentine's Day chocolate from other girls, meaning he is somehow popular with girls. Like Shūtarō Mendō and the other male students, he is also in love with Lum and will try to prevent her from kissing Ataru, trying to protect her purity. In the later half of the series, he and Hokuto begin to become victims of the daily shenanigans. In the anime he only ever appears as a background character, and his roles are always given to either Megane or Perm.

He and Hokuto appear in the first chapter of the manga, but are replaced by Lum's Stormtroopers in Chapter 3. Kōsuke reappears shortly after Mendō debuts and quickly claims the position of main supporting character. In the anime, a lot of his major roles are taken by Megane, such as the Shinobi Nobade plot (renamed Kumino Otoko) and receiving a love letter from Lum in "Capture the Heart". In the final scene of Urusei Yatsura: The Final Chapter, Perm watches on in Kōsuke's place when Lum and Ataru embrace.

In "Farewell, Onsen-Mark", Onsen-Mark lists Ataru & Kōsuke as the two most dangerous students in the troublesome Class 2-4.

His handwriting is messy and he has poor writing skills, which Mendō frequently insults him for. However, his writing skills are good enough to trick Ataru in the Shinobi Nobade story.

Name Meaning

Kousuke's name comes from Shirai Kousuke (白井 康介, Shirai Kousuke?), an editor at Shogakukan at the time Urusei Yatsura was being serialized.

Trivia

Media Appearances

Manga

  • Chapter 26 (27 in wideban)
  • Chapter 29
  • Chapter 32
  • Chapter 33
  • Chapter 34
  • Chapter 35 (37 in wideban)
  • Chapter 36 (35 in wideban)
  • Chapter 37 (39 in wideban)
  • Chapter 38 (36 in wideban)
  • Chapter 39 (38 in wideban)
  • Chapter 42
  • Chapter 43
  • Chapter 48
  • Chapter 50
  • Chapter 51
  • Chapters 52-54
  • Chapter 55
  • Chapter 57
  • Chapter 61
  • Chapter 70
  • Chapter 78
  • Chapter 79
  • Chapter 82
  • Chapter 84
  • Chapter 85
  • Chapter 87
  • Chapters 92-94
    • Chapter 92
    • Chapter 94
  • Chapter 99
  • Chapter 100
  • Chapter 104
  • Chapter 105
  • Chapter 106
  • Chapter 110
  • Chapter 112
  • Chapter 113
  • Chapter 115
  • Chapter 116
  • Chapter 117
  • Chapter 118
  • Chapter 119
  • Chapter 120
  • Chapter 121
  • Chapter 123
  • Chapter 128 (127 in wideban)
  • Chapter 129 (128 in wideban)
  • Chapter 131
  • Chapter 133
  • Chapter 135 (138 in wideban)
  • Chapters 136-138 (135-137 in wideban)
    • Chapters 137 (136 in wideban)
    • Chapters 138 (137 in wideban)
  • Chapter 141
  • Chapter 142
  • Chapter 143
  • Chapter 148
  • Chapter 149
  • Chapter 150
  • Chapter 152
  • Chapter 153
  • Chapter 154
  • Chapters 155-157
    • Chapter 155
    • Chapter 156
  • Chapter 158
  • Chapter 161
  • Chapter 163
  • Chapter 164
  • Chapter 165
  • Chapter 167
  • Chapter 168
  • Chapter 169
  • Chapter 170
  • Chapter 172
  • Chapter 173
  • Chapter 174
  • Chapter 177
  • Chapter 178
  • Chapter 182
  • Chapter 186
  • Chapter 191
  • Chapter 196
  • Chapter 198
  • Chapter 204
  • Chapter 205
  • Chapter 206
  • Chapter 209
  • Chapter 210
  • Chapter 211
  • Chapter 212
  • Chapter 213
  • Chapter 214
  • Chapter 215
  • Chapter 216
  • Chapter 221
  • Chapter 228
  • Chapter 230
  • Chapter 232
  • Chapter 234 (236 in wideban)
  • Chapters 235-236 (234-235 in wideban)
  • Chapters 237-239
  • Chapter 240
  • Chapter 241
  • Chapters 242-243
  • Chapter 244
  • Chapter 259 (254 in wideban)
  • Chapter 261
  • Chapter 262
  • Chapter 263
  • Chapter 265
  • Chapter 266
  • Chapter 268
  • Chapters 269-271
    • Chapter 269
    • Chapter 271
  • Chapter 272
  • Chapter 278
  • Chapter 279
  • Chapter 280
  • Chapter 281
  • Chapter 283
  • Chapter 285
  • Chapter 291
  • Chapter 294
  • Chapters 301-304 (300-303 in wideban)
  • Chapter 306
  • Chapter 313
  • Chapter 316
  • Chapter 322
  • Chapter 326
  • Chapter 327
  • Chapter 334 (329 in wideban)
  • Chapter 338-340
  • Chapter 354
  • Chapters 356-366
    • Chapter 356
    • Chapter 357
    • Chapter 364

Anime

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