Ekaterina II S

Ekaterina II S (エカテリーナ二世号・改) is a large general purpose transforming robot manufactured by Kongou Airlines in Academy City. It is named after Kongou Mitsuko's pet python Ekaterina.

Principles
Initially looking like a large utility truck, it can transform into a large Powered Suit, similar to that of Multi Active Rescue's Gigantic Advanced Movement Armor. Like it, it has wheels upon its feet to roll on a flat surface and has been shown to be very quick. It also has clamps for grabbing things, as well as a pile bunker. It's arms and legs can be disconnected from the torso.

It requires two people to pilot it, and is apparently easy enough for two middle school students, like Uiharu Kazari and Saten Ruiko, to pilot it during combat without experience and only a single night of studying its manual. Thanks to Ekaterina II S, they were able to defeat the two mobile weapons owned by STUDY, during the Silent Party.