Sarco and TataTwin Magimate hatchlings that have hatched fused together in the egg and miraculously didn't die. The large one is Sarco (male) and the little one is Tata (female)
Sarco is small for the average size of his species, but is healthy and active. Tata's growth is slow and doesn't have much energy, so she spends most of the day sleeping. She can barely eat and communicate, so whenever Tata needs food Sarco regurgitates food or rips food up for her. (They both have their own esophagus but share the same stomach). Sarco was healthy, so his parents raised him until his feathers started to grow. But with weak muscles and bad body balance making him unable to fly, he was abandoned by his parents during flight training.