Udajo is a Japanese illustrator recognized as the original character designer and main illustrator for the Brothers Conflict multimedia franchise. The project began as an original novel series and illustration collaboration launched by ASCII Media Works. The first novel was published on December 22, 2010, in the magazine Sylph, with the series created by Atsuko Kanase and written by Takeshi Mizuno, while Udajo provided all accompanying illustrations.

The success of the initial novel series led to the expansion of Brothers Conflict into a broader franchise. Udajo’s character designs served as the visual foundation for multiple adaptations. These included two otome video games developed by Idea Factory and published by Otomate: Brothers Conflict: Passion Pink, released in May 2012, and Brothers Conflict: Brilliant Blue, released in September 2013. The property was also adapted into a 12-episode anime television series produced by the studio Brain’s Base, which aired from July to September 2013. For the anime adaptation, Udajo was officially credited with the original character concepts, which were then adapted for animation by character designer and chief animation director Kumi Ishii. Following the television series, Udajo was also credited for the original character designs for the two-episode original video animation released in December 2014 and February 2015.

Udajo’s artistic identity is closely tied to the Brothers Conflict series, having illustrated the main novels, the second season novels, and various short story collections within the franchise. The body of work demonstrates a specialization in creating character designs for the otome and reverse harem genres, which are aimed at a female demographic. The artistic style is defined by a distinct approach to character aesthetics that became the visual signature of the franchise, which also expanded to include a yonkoma manga, drama CDs, and an art book titled Udajo Art Works Brothers Conflict.

The significance of Udajo’s contribution to the industry lies in providing the original creative vision for a property that successfully transitioned across multiple platforms. Starting as a serialized novel with illustrations, the franchise grew to encompass interactive media in the form of video games, animated adaptations for television, and print media, all unified by Udajo’s original character concepts. This trajectory illustrates the role of a character designer and illustrator as a foundational creator in the development of multimedia franchises within the Japanese anime and manga industry.