Just some quick questions about the fear aura.
1. Can it be suppressed?
2. If the lich polymorphs or otherwise transforms, does the aura continue?
3. If someone above 5 HD fails, but stays within range when the shaken condition wears off, are they immune for 24 hours?
1) Yes.
2) Edit: I would say he needs to appear somewhat like a lich. If a lich was disguised as a kitten, I can't imagine the fear aura actually working since it's contingent on sight.
3) No. They need to make a successful save.