Later during development, Bryan suggested that the characters in the game should appear cuboid, and thus finalised the designs with smooth edges, whilst retaining the two characters' original appearances.[22] Due to the game revolving around the theme of construction, the team went to lengths to ensure that the game's aesthetics look like "everything was constructed" with patchwork, to give the illusion that "everything was patched together".[22] Mayles stated that all of the voice-work from the characters were performed in-house by Rare staff; Banjo-Kazooie lead programmer Chris Sutherland reprised his role of voicing Banjo and Kazooie.[27]