Whose avatar is on the voice ball of tt voice?

The avatar on the tt voice ball can be changed. The two icons displayed in the upper right corner of the friend profile interface (a red minus sign in a circle and an avatar in a circle) represent that the current account has set permissions related to the circle of friends. .

There is a red minus icon in the black and gray circle, which means that the current account has set the "Don't see his Moments" function for this friend. After setting this function, the current account's Moments will no longer push the friend. Friends’ circle of friends information.