Originated from Futaba Channel's Inner Model board (模型裏板, mokei uraban), the meme is based on a collaboration of 1/144 scale Gundam AGE-1 Titus parts and a Madoka Kaname figma. While this was made purely for fun, somehow the meme caught interest due to how fitting it is. The meme was taken another step further using Madoka's infamous despair face.
Other variations exist such as Homura Sparrow, a combination of AGE-1 Sparrow and a Homura Akemi.
In order to fit the Gundam parts properly into the figma, one has to perform minor modifications on the legs (either the Gunpla parts or the figma's legs). The arm parts however can be attached right away.