Koha-Ace (コハエース?) is a parody manga by Keikenchi, licensed by TYPE-MOON and serialized in Comptiq since 2012, spanning seven arcs as of January 2019. It stars Kohaku and features characters from various TYPE-MOON series. It is drawn in a super deformed style, and it is a self-aware series that constantly breaks the fourth wall. The name of the series itself combines the names of Kohaku and TYPE-MOON Ace magazine.
- Main article: Fate/KOHA-ACE
Fate/GUDAGUDA Order (フェイト／ぐだぐだオーダー, Feito/Gudaguda Ōdā?) is an online parody manga by Keikenchi, featuring characters from Koha-Ace. It began prior to the release of the game and kept track of news and speculations around the game for 28 issues. As of January 2019, 10 supplementary issues have been released to commemorate its tie-in events with Fate/Grand Order.
The characters were featured in animated sequences during 2016's Fate Project Ōmisoka TV Special ~First & Next Order~. It also received multiple Drama CDs in issues of Comptiq.