To ensure he was not trapped by the fox girl's charm again, Jerome purposely did not go to the Beast world for days. Neither did he help his adoptive father devise a strategy to trap all the fox clans to destroy them at once.
Jerome chose to isolate himself in his star world so that no one would bother him. He wanted to calm down, trying to escape from the bondage of the little girl's charm.
To his knowledge, almost no one could escape the fox clan's enchantment since the fox's charm magic was deadly and irresistible. The more tails the fox had, the stronger its enchantment magic entanglement.
Guinny only had one tail, and the little girl was still very young, but her charms were so deadly that Jerome was utterly helpless. The only way to escape the fox clan's enchantment was to stay away from the little girl and meditate for a few days.
