Grey's expression turned dark when Klaus asked this question.
"Nothing." He replied and stopped looking at them as he looked ahead of them with all seriousness.
Klaus burst out laughing when he heard this. Grey's reaction also confirmed some things, he had definitely seen this bunny leader before, and he most likely suffered a loss at its hand, well, paws.
If they knew that the bunny leader had made Grey run for his life two times already, adding this encounter which made it three, they would be shocked. Grey was actually bested by a small bunny that didn't look like it could hurt a fly. Of course, they all knew that looks can be deceiving, especially given how powerful Magical Beasts were. But seeing that this cute bunny got the better of Grey was funny.
Grey acted like he didn't see them and continued walking forward. He tried to see if he could communicate with the bunny, but he didn't get any response.