A personified Ultra kaiju project originally proposed by Griffon Enterprises, which was officially sanctioned by Tsuburaya Productions after the success of the 2011 Ultra kaiju variety show Ultra Zone. The project would be split into various sub-projects (or versions) across multiple companies - the Griffon Enterprises mixed-media project designed by Pastel Design's POP, the Dengeki (Kadokawa) mixed-media project developed by ASCII Media Works, the Plex figures, the Kodansha project, the Tokyo Otaku Mode project, the KAIJU MUSUME 6 restaurant operated by THINKR, and the AKB48 crossover Tanamiclas. The transcorporate multimedia project would be formally announced in 2013 through Haitai Nanafa, and by 2020, each project had officially ended.
Of the six projects' designs, the Dengeki designs would generally be the most popular in fanart, in part thanks to the light novel and anime series that ran from 2015 to 2018, with the Plex designs following behind it, and after it the POP designs (varying from kaiju to kaiju).
This tag implicates ultra_series (learn more).