The RX-178 Gundam Mk-II is a mobile suit from Kidou Senshi Gundam Zeta, introduced as a next-generation prototype developed by the Titans. It serves as one of the main machines piloted by key characters, especially Kamille Bidan, and becomes central to the conflict between the Titans, AEUG, and later the Gryps War. The Gundam Mk-II is notable for its advanced movable frame design, improved performance, and its role as an important stepping stone in mobile suit evolution.