You will first meet Dogu in Pam's Storage Room. He is a doll from Origin Island. He is Grace's friend and helps her out with her work at the island shrine. In the beginning of the Origin Island expansion pack, Dogu is seen trying to do something to the door.
When Daemon first meets Dogu, he comments on how he can feel a very strong, magical power emanating from him. He said it feels as strong or perhaps even stronger than his father's power. He describes it as "A hidden power, perhaps? Or a sleeping one, waiting for the right time...?" Dogu mistakens Yuelia as her mother, Celestia.