"Spill it, How do you do it? Not only does Mahamahim not notice you but I am also able to hear his thoughts, And how he does not see us? We were standing right in front of him, and he called me a troublemaker. That is blasphemy, since when did I cause trouble? I am a peace-loving boy."
Karna after seeing Bhishma gone, Picked a white fox by her nape and held the front of him asking her questions. She might not going to understand his words but she damn well feels his emotions.
*Lick*
So Fox did what she always does when confronted by Karna, She licked his face and gave him an innocent look as if saying that she didn't know a thing.
But Karna here might have figured it out, After all, he has a functional working brain, So he put her back on his shoulder and seat under the tree to think through his conclusion.