Her head tilted a little, and her eyebrows came up a little bit. Just how powerful of a legilimens had they angered or were worried about having pissed off? Quite honestly, and quite bluntly, at where they were - not having any experience - they were completely helpless. The only way to get good enough was experience, time, and to accelerate it, a friend who was that good of a legilimens to test their limits and push it farther. The only legilimens Felixa had known who had tried to use it against her was dead. For that, she was glad.
"You need to be an extraordinary occlumens to resist that," Felixa replied without mincing words, "And even then, with that powerful a legilimens it would likely come down to chance, for which way it would go. Honestly, if you come up against a legilimens that powerful anytime soon, potentially ever, they will succeed. The only hope you probably have then is to have someone who can tell you it is fake that you will believe."
She paused for only a moment, looking at them. If that happened to her or Tibby, the other would be able to help unless they had both been compromised. "If you two tell each other everything, then you are likely each other's safety nets," Felixa replied. But the more subtle the memory was, the more difficult it would be to catch.