Luna's cautious behavior reflected her awareness of the potential dangers posed by enemies with abilities like Telepathy and mind reading. Having likely encountered adversaries adept at these skills before, she understood the risks of having her thoughts or knowledge compromised. Telepathy and Mind Reading could allow enemies to infiltrate her mind, potentially extracting valuable information or manipulating her thoughts.
In such a scenario, Luna's caution was not just about protecting herself but also safeguarding critical information that could impact her goals or the safety of those under her care. Her wariness suggested a strategic mindset honed by experience, where the threat of psychic intrusion was a tangible concern in her dealings with others, especially in situations involving unfamiliar or potentially hostile parties.