A creature with Grab can grapple at a -20 penalty; if it succeeds then it does not gain the grappled condition. Grapple rules state that when grappled, non-adjacent creatures are moved to adjacent spaces. Can the controlling creature (the one without the grappled condition) then move or 5 ft. step away from the grappled creature, assuming it stays within the controller's reach? Nothing I am seeing currently suggests that it breaks the grapple, though I presume whenever the controller makes a successful grapple check the creatures would be moved adjacent again.
These are potentially useful tactics for White-Haired Witches, who gain a psuedo-Grab, without the -20 on grapple.
I'd appreciate some feedback on this. Thanks!