Sarah is Marcus's mother. She is a light-hearted and caring woman. She is joyed to be around happy people, especially company at her home.
She seems very open minded about Agumon and the fact that her son is a part of a government organization.
Sarah is married to Professor Spencer Damon, who was a researcher until he turned up missing about 10 years ago.
Kristy
Kristy is Marcus's witty sister. Though much younger, Kristy displays the control that Marcus lacks.
Kristy looks up to her brother and her kindness matches that of her mother's.
Director Hashima
Director Hashima is in charge of the Confidentiality Ministry that oversees DATS and their actions. He has the power to shut down the DATS organization and ends up doing so when he feels they're not doing enough to deal with the Digimon entering the real world.
Dr. Spencer Damon
Spencer Damon is husband to Sarah and father of Marcus and Kristy. Ten years before Marcus and Agumon met, Spencer went to the Digital World as a part of the original exploration team but did not return.
After meeting Merukimon, Spencer set off to find King Drasil to seek peace between the two worlds.