augite and ICEKnight noticed this on Hidden Palace -- Tadayoshi Yamamuro is credited with the art.
He is the Dragon Ball Super and Dragon Ball Heroes character designer. He is known for his straight style, as opposed to Minoru Maeda's more rounded style, and he is recognized as the chief animator and illustrator of the modern Dragon Ball franchise.
He became a main character designer for Dragon Ball Z after Minoru Maeda left Toei Animation in November 1992, at the end of the Perfect Cell Saga, a role that he shared with Katsuyoshi Nakatsuru until the end of Dragon Ball GT in November 1997.
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Question is, do we think he also did the main character art? We know Toriyama drew the scenes, since they're credited to him explicitly in his 2000s artbook, but...