- Dot Comet: A spunky and adventurous young girl who is always ready for a new challenge. - Hal: Dot's loyal pet dog who is always by her side and helps her on her various quests. - Ruby Marshall: Dot's best friend who is smart and resourceful. She loves solving puzzles and cracking codes. - Nev and Dev Jumelle: A mischievous pair of twin brothers who are always causing trouble. They have a knack for technology and use their skills for their own gain. - Mrs. Comet: Dot's loving and caring mother who supports her daughter's adventurous spirit. - Mr. Comet: Dot's fun-loving and quirky father who often joins in on Dot's adventures, bringing laughter and comic relief to the group.