There's a second figure here standing ab extra, and that's the moon hovering overhead: "while over-head the Moon / sits Arbitress."

这里有第二个置身事外的角色，就是高高挂在空中的月亮：,“月亮高挂天心，像个公正的决断人“

耶鲁公开课 - 弥尔顿课程节选

An arbitress is a judge and she would seem to oversee the justice in this world.

决断人是一个裁判，她监视着,世上所有的公平正义。

耶鲁公开课 - 弥尔顿课程节选