Even if Charles doesn't try and go digging around in my head without permission there are plenty of other telepathic individuals in this world who would.
Cid just chuckled, finding it amusing, which caused Sherry to grow embarrassed. Cid tapped Sherry's forehead, saying, "Very well. From this moment forth, as the leader of the Shadow Garden, I, Shadow, shall bestow upon you the name of Phi."