Eiri Shirai (白井鋭利) is the illustrator of the Hai to Gensō no Grimgar series along with other light novel works. Although Shirai illustrated for six series, Grimgar is by far the artist's most well-known.
In 2017 Shirai was the character designer for Red Entertainment's Our World is Ended PS Vita visual novel. It revolves around a team of programmers creating a program that starts to develop reality-warping capabilities of its own.
- Fundari Kettari! Ano Ko no Egao wo Mamottari (2012)
- Crisis Gear (2013-2014)
- Grimgar of Fantasy and Ash (2013-ongoing)
- Ayuhara Yorunami wa Yoku Nureru (2013)
- Dual Sword Liberator (2014-2015)
- Youhei Monogatari: Junsui naru Rebellion (2015-ongoing)
- Our World is Ended (2017; game character design)