Haiyore! Nyaruko-san Light Novel Covers

On the cover of each volume of the "Haiyore! Nyaruko-san" light novel series, except for the first volume, Nyaruko is making a pose that mimics the transformation pose of a Kamen Rider, a super hero in a series of Japanese television shows called "Kamen Rider" (仮面ライダー).

On the cover of volume 2, Nyaruko is mimicking Kamen Rider 1 from "Kamen Rider" (仮面ライダー), the first show in the "Kamen Rider" series. It aired from 1971 to 1973.

On the cover of volume 3, Nyaruko is mimicking Kamen Rider 2, who is also from "Kamen Rider" (仮面ライダー).

On the cover of volume 4, Nyaruko is mimicking Kamen Rider V3 from "Kamen Rider V3" (仮面ライダーV3), the second show in the series. It aired from 1973 to 1974.

On the cover of volume 5, Nyaruko is mimicking Kamen Rider Agito from "Kamen Rider Agito" (仮面ライダーアギト), the 11th show in the series. It aired from 2001 to 2002. Specifically, Nyaruko is mimicking Agito's transformation pose that he does starting in episode 15.^S1

On the cover of volume 6, Nyaruko is mimicking Kamen Rider Amazon from "Kamen Rider Amazon" (仮面ライダーアマゾン), the fourth show in the series. It aired from 1974 to 1975.

On the cover of volume 7, Nyaruko is mimicking Riderman, who is also from "Kamen Rider V3" (仮面ライダーV3).

On the cover of volume 8, Nyaruko is mimicking Kamen Rider ZX from "Juugou Tanjou! Kamen Raidaa Zenin Shuugou!!" (10号誕生!仮面ライダー全員集合!!), "Birth of the 10th! Kamen Riders All Together!!", a TV special episode that aired in 1984.

On the cover of volume 9, Nyaruko is mimicking Kamen Rider Black from "Kamen Rider Black" (仮面ライダーBLACK), the eighth show in the series. It aired from 1987 to 1988.

On the cover of the limited edition release of Volume 9, Nyaruko is mimicking Kamen Rider Black RX from "Kamen Rider Black RX" (仮面ライダーBLACK RX), the ninth show in the series and a direct sequel to "Kamen Rider Black". It aired from 1988 to 1989.

The two covers for volume 9 are also referencing episode 27 of "Kamen Rider Decade" (仮面ライダーディケイド), which is the nineteenth show in the series and aired in 2009. In this episode, Kamen Rider Black and Kamen Rider Black RX transform together for the first time.^S2 Images for reference:

On the cover of volume 10, Nyaruko is mimicking Kamen Rider Super-1 from "Kamen Rider Super-1" (仮面ライダースーパー1), the seventh show in the series.^S3 It aired from 1980 to 1981.

On the cover of volume 11, Nyaruko is mimicking Kamen Rider Blade from "Kamen Rider Blade" (仮面ライダー剣), the fourteenth show in the series.^S4 It aired from 2004 to 2005.