Swivel articulation is achieved by simple vertical split ankle articulation allowing dynamic posablilty. Since the scale is small, it's hard to achieve all around movement, but even this limited range of mobility amps up the playability with dramatic poses. The first image is Dante from DMC 1. The following images are Dante from DMC2. Here's a link to an image I made with these trading figures:
Flickr "Devil May Cry 2" Devil May Cry 2