Banta Arano serves as a supporting character in the original UFO Robo Grendizer television series. He works as a ranch hand at Danbei Makiba's Shirakaba Farm alongside other employees. His primary narrative function is providing comic relief, often fueled by his competitive rivalry with Boss, another farm character. Both frequently vie for Hikaru Makiba's attention.

Banta possesses a distinctive appearance, typically wearing a hat and scarf, and is characterized by an overweight build. His rivalry with Boss escalates into comedic confrontations and physical brawls, creating disruptive slapstick humor on the farm. These conflicts usually conclude with Danbei Makiba disciplining both individuals. Banta's presence also enhances the ranch's Western-inspired atmosphere.

His characterization remains consistent throughout the series, without significant evolution or an explored background story across episodes or other official media like films, OVAs, or spin-offs. Banta does not participate in the main conflict against the Vegan Empire. His appearances are exclusive to the original 1975-1977 anime and do not extend to later franchise reinterpretations such as the Grendizer Giga manga or Grendizer U television series.