What Marvel character does Thanos fear more than anyone?

Some might say Thor, or Captain Marvel, because they obliterated his forces and came dangerously close to defeating him.

I disagree. The most pain we ever see on Thanos’ face is right here.

Look at the sheer pain and anguish.

Only moments before, he was swinging his massive sword for a killing blow, the same sword that easily deflected Thor’s lightning and tore apart Captain America’s shield. And how did it fare against Wanda?

With a single blast, she tore it from his hands and ripped a massive chunk out of it.

From then on, Thanos was powerless.

Never in Thanos’ life had he faced someone so absurdly out of his league. Wanda was tearing him to pieces. The only reason she didn’t kill him right there and then was because she wanted him to feel EVERY ounce of pain she had felt losing Vision. Much like Thor, she sacrificed a killing blow for revenge.

Regardless, Thanos was terrified. He had to order an airstrike on his own forces just to stop her, a move that was guaranteed to hurt his army more than the Avengers.

Thor and Captain Marvel are formidable opponents. But neither one of them could scare Thanos to the degree Wanda did.

She may be a glass cannon, but once the cannon is fired, she is nigh unstoppable.