What is the role of a nanny?

My father is Adam the exorcist, and my wet nurse is Suo Na, the Force girl. Inverse War is an online game developed by Lin Langtian's studio under Tencent and released by tencent games. In this game, the wet nurse is Adam, the exorcist, who belongs to the reloading role, and the wet nurse is Suo Na, a young girl of the Force, who belongs to the therapeutic auxiliary role.