Collection: The Great Ace Attorney

Soseki Natsume's precise and varying movements in both games were created using motion capture technology, with the only direction from director Shu Takumi being to "strike a funny pose".

During the recording sessions for both games, Ryunosuke's Japanese voice actor, Hiro Shimono, frequently had trouble pronouncing Susato's first name as "Susato-san" (すさとさん), often slurring it as "Susassan" (すさっさん) instead.

Character designer Kazuya Nuri designed Ryunosuke and Susato to be "simpler and more stoic" than the most of the other characters, stemming from a personal distaste for adding character design elements that were irrelevant to the game's story. Thus, he made several suggestions, such as requesting that Ryunosuke's armband act as an attorney's badge of sorts (which did not exist in the era the games take place) and asking that the katana Ryunosuke is seen with be relevant to the overarching plot.

In Japanese, Ryunosuke occasionally says "kashira" (～かしら), a feminine ending particle meaning "I wonder" (i.e. thinking to himself). According to series localization director Janet Hsu, he was written to say this to include more period-specific speaking patterns that would be used by any Japanese citizen during the Meiji era, despite the term itself being strongly perceived in the modern day as feminine. Historically, usage of the term and other terms qualifying as "Japanese women's language" were based largely on the "soft-spoken, indirect, and refined" speech styles of women within the middle to elite classes in Tokyo, inferring that those who spoke that way came from a well-to-do upbringing and educational background. In fact, it was so unusual for a man to use it in modern times that one of the Japanese playtesters for The Great Ace Attorney Chronicles flagged it under the belief it was a bug.