Here’s the energy blades and rockets!
The concept art for Springans Captain Sargas is here, showing more info on the design for Sargas! Sargas gets around mainly by jumping / flying and it’s shoulder rockets are able to rotate around. Incidentally Springans Rockey is stated to be about 2.5 times the size of Sargas’ rockets. When Sargas laughs, it’s face armor can open up wide.
Source from TCG Official Twitter