This is a review of a snap-together kit with only the twin eyes fitted with stickers. I will mainly be commenting on the movement and the parts that I found interesting. I also took a variety of photos to see what kind of expressions the machine can produce. This is a rather long article. The poses are just my imagination, so there are no spoilers.
Mobility of the limbs: They are movable on one axis, known as a cantilever joint. If the limbs are slender and shaped so that they do not interfere with each other, then it seems that they can bend sufficiently on one axis. Conversely, previous double joints may have been a "movement structure that avoids interference," like a two-stage right turn.
The crotch has a small number of thigh parts.

[Kit Review uuuuuu] Exploring the facial expressions of the latest machine, the Sieg Axus! | KEESIA's Gunpla works