If there was one thing that Grace had to know about him, it was that he was HIGHLY protected of his face. So when the Slytherin casted the Bat-Bogey Hex towards him and there was no light to follow, the Gryffindor quickly waved his wand and stopped the hex with the use of the protego spell. However, when he had let go of the shield to cast a spell in her direction he was hit by another spell.

Although it didn’t hurt, probably the magic, he did feel his ears shrivel up and noticed that he couldn’t hear the sounds around him anymore. What he could hear, was his own blood rushing and the beating of his heartbeat. He knew he wasn’t able to hear Grace anymore so he had to pay extra attention to what she would be doing. ‘Just like non-verbals, Yoongi, you got this’

He pointed his wand at the Slytherin again and , although he couldn’t here himself, sent the Homing Spell towards her. It zoomed like a missile locked on its target. Which it was.