The DC-50C Loto is a transformable mobile suit used by Earth Federation's special forces, the ECOAS, and typically operates in pairs. It is developed by the Strategic Naval Research Institute (SNRI) to meet the following three demands from ECOAS: a small body size to ensure stealthiness/secrecy, the ability to function as a troop carrier and lastly, high mobility for swift operational deployment. Loto's operating data was later used by SNRI for the development of future miniaturized mobile suits.

At around 12.2 meters, the Loto's small size is made possible due to SNRI successfully miniaturizing the mobile suit reactor. Although this reactor's output is much lower than other contemporary mobile suit reactors, it is sufficient for powering the Loto. Another factor for the Loto's size is the adjustment of the clearance for each part of the mobile suit in the scale of millimeters to remove dead space. To serve as a troop carrier, the Loto has a compartment in its back for carrying up to eight soldiers and they exit via a foldable loading ramp in the lower back.

To keep it highly mobile, the Loto's thrust-to-weight ratio is increased; this is achieved through keeping the Loto's weight down via equipping it with the bare minimum amount of armor needed for protection against ballistics. The Loto's ability to transform from a mobile suit mode to tank mode facilitates rapid deployment of the carried soldiers and also reduces its height to around 3–4 meters. Furthermore, the treads of the tank mode also help the Loto to transverse over uneven terrain much more easily.