Charles is part of the group unexpectedly transported to Camelot during a birthday celebration. Notably super-intelligent, his sharp analytical skills prove crucial when the group must deduce the specific conditions required to draw Excalibur from the stone, pinpointing the necessity of a solar eclipse. He interacts with the main protagonist, Marina, and the other friends within their group dynamic throughout their shared adventure in the Arthurian realm. The narrative positions him as one of several companions supporting Marina in her mission to aid Arthur.