In "Dragon Ball Z", the reason why Whis is not afraid of Quan Wang is because Whis is the son of the great priest and knows Quan Wang relatively well, and Weiss is from the angel family and is destroying the universe. There are times when angels are spared. Therefore, even though Quanwang is very capable of destruction, he cannot destroy the angels, so Weiss is not afraid of Quanwang.

As an angel in the divine world, Weiss's real strength is stronger than the God of Destruction. When the god he is responsible for serving dies, his function as an angel will cease until the next god of destruction appears.

Extended information:

In contrast to the grumpy Beerus, Whis in "Dragon Ball Z" appears to be gentler, generous, humble and respectful. Whis doesn't like fighting. Like Beerus, he is a foodie and wants to taste the food in the entire universe. Befriended Bulma because of Earth's delicious food. Beerus's pet prophecy fish often eats delicacies of the earth without Beerus's knowledge while Beerus is sleeping.

Although Weiss does not have the ability to teleport, he has the fastest speed in the universe, far exceeding the speed of light. He can take many people to anywhere in the universe within a few hours or even dozens of minutes.