Hypothesized to nominally reflect her (intra - extra)-personal dichotomy by contrasting appearance with action or thought; to foreshorten explanation, the word "bonnie" translates into "pretty" or perhaps "comely" (positive apperance), and "Rockwaller" subsumes "rock wall," modified by the morpheme "er" which suggests Bonnie is an actuator to rock walls, symbolically; this does not evoke warm and fuzzies. A more potent explanation for "Rockwaller" is that it is almost phonetically identical to "rottweiler," a vicious breed of dog that shows inclination to chomp its teeth into you (action). This is a possible explanation.
Confidence: 40