Angela "Angie" Roberts is one of the three central child characters in the anime. She is the older sister of Corwyn "Corky" Roberts and is described as the best friend of Justin Casey. In the group dynamic, Angie frequently assumes a motherly or nurturing role, often acting as a caretaker and a voice of responsibility for her younger brother and her friend. Her personality is defined by her reliability and her consistent presence when she is needed by those close to her.

Angie's background is that of an ordinary child whose life changes dramatically when she, along with Justin and Corky, stumbles upon a mysterious house in the woods while playing hide-and-seek. This discovery leads to her introduction to Professor Humphrey Bumble and his robot companion, Solar Ion Robot, and ultimately to an unintended journey through time aboard the titular Flying House. Her primary motivation throughout the series is tied to this unexpected adventure; she and her friends must navigate their way through the past while witnessing events from the New Testament, all in an effort to find a way back home to their own time period.

Within the story, Angie serves as a key member of the core group of travelers. She participates in and observes numerous biblical events, from the birth of John the Baptist to the ministry of Paul the Apostle, alongside her companions. Her key relationships are central to her character. She shares a close sibling bond with her younger brother, Corky, and a strong friendship with Justin, forming the trio at the heart of the series. She also interacts regularly with the eccentric Professor Bumble and the robot S.I.R., who becomes a friend to the children. Regarding her development, no specific arc or personal change is detailed, as the series focuses primarily on the group's collective experiences and their witnessing of historical religious events rather than deep individual character growth. There is no information available about any notable abilities or special skills possessed by Angie Roberts.