I am usually posed with a ball balanced on the point of my nose, or I can mean to be closed tightly

It is known for having many B’s, but it only starts with one.

Emily Theresa, your mother wants to speak with you

Once led by Mercury, but Alas! The reign was cut short. I may sit on a throne or regale with rhapsodic melodies.

Listen outside, For crickets and birds, Down at the rink, A discouraging word