Based on available search results, no official information or reliable direct information could be located for a character named Banta Arai specifically from the anime film Danguard Ace vs. Insect Robot Troop.

However, information from fan-maintained sources identifies Banta Arai as a character from the broader Danguard Ace television series, which the film is a part of. This description is based on those unofficial sources and may not specifically reflect the character's portrayal in the film.

Banta Arai is a young man and a main character in the Danguard Ace series, acting as a friend and ally to the protagonist. He is generally depicted as having a relaxed and cheerful personality, in contrast to some of the more serious characters. Despite not being the strongest physically, he is portrayed as possessing a sharp and resourceful mind, often contributing ideas and solutions to help his team overcome challenges. His primary motivation is to support his friends and comrades in their fight against the forces of the antagonist, Mr. Doppler.

In the story, Banta serves as a vital member of the main team, using his intelligence to aid in combat and strategic planning. He shares a particularly close relationship with the main character, fighting alongside him in numerous battles. His loyalty and reliability are highlighted as key traits, making him a dependable presence. While the series does not focus heavily on his personal development, his unwavering support for his friends is a consistent aspect of his role. His notable abilities are not physical strength but rather his cleverness, problem-solving skills, and quick thinking in difficult situations. He is also described as having a competitive and action-oriented nature, comfortable with taking risks and making quick decisions as a practical problem solver.