Chara does stop, but only because they've started laughing in his face - it's loud and raucous, white teeth and red iris bared.

He's bent down to grab their shoulders, so they aim a kick at the soul(??) jar in his midriff, still laughing. He dislikes harming children, does he? Such an inconvenience for him! The reverse very much does not apply.

If he does not back. Off., then they'll go for their weapon.