Grag is one of the key characters in the classic science fiction anime series, Captain Future. He is a massive, powerful robot created by Dr. Simon Wright, the Brain. Grag is part of Captain Future's crew and serves as the muscle of the team, providing immense strength and support during their intergalactic adventures. Despite his intimidating appearance, Grag possesses a gentle and kind nature, often showcasing a deep loyalty and affection towards his human companions. His role in the series is crucial as he assists in various missions, ensuring the safety and success of Captain Future’s endeavors.