Ptolemaios 2 Kai is an enhanced/upgraded version of CBS-74 Ptolemaios 2. Because Celestial Being lost Wang Liu Mei, their last financier to sponsor their projects, a conservative engineering approach was decided to enhance and extend its capabilities in anticipation against the ESF Forces. As such, most of its physical layout remains the same, but a series of additions/enhancements, including a visible pair of boosters, have been integrated into Ptolemy.

The original pair of thruster modules (on the side and in between its steering fins) have been extended with a pair of GN Boosters. The newly added boosters extend from the mid-rear section and pass its thrusters, nearly three-quarters the length of Ptolemy's body. While subtle, the boosters provide additional power to propulsion and protection to Ptolemy. It provides an additional layer of shielding for its entire length and now the main thrusters have greater coverage against enemy fire. When the condensers on the GN Boosters run out of particles, they can be jettisoned and the verniers will be used as main propulsion. Allied units can also use the boosters as cover against enemy fire as well.