Arthur Milligan

Arthur is the son of Beth and Roy and the best friend of Timmy and Madeline.

Personality
Arthur's story begins with his father's untimely passing. The night Arthur moves to Granite Flats, he sees what he thinks is a comet. Being the curious young boy he is, he sets out to learn what it was for sure.

Arthur is clever, thoughtful and very smart. He is usually seen as the peacemaker among his friends Madeline and Timmy, who often argue. He feels strongly about his own opinions and defends them when needed.

At the end of season 2 of the series, Arthur is shown to spend more time alone. He is not a closely knit to Timmy and Madeline as he was once before.

After the death of his mother, his maternal aunt Alice comes to live with him. He remains distant from his friends until the latter half of season 3, when Frank Quincy hires the three of them to investigate the death of Beth.