Rui was sincerely grateful to the Mother of Nature for hiding him when he needed it the most. He was glad that his prophecy technique had shown him someone who identified that he, too, had felt the Transcendent Fear when he activated Gigabrain. If he could repay the debt by helping them learn what they needed to learn.
Although it wasn't ideal that an outsider learned about Martial Transcendents, he still kept his word, telling her everything that he knew about the fear.
Mother Maeria, on the other hand, could hardly contain the joy of finally having someone who understood what she had felt. She had gone more than a century without a single person being able to experience the fear that she experienced, leaving her deprived of real understanding from the people around her.
She had even been treated as crazy for suggesting that there could be some cosmic horror beyond Gaian limitations that could potentially destroy all of them.