Gamma was born with the ability to switch genders. He/she's called 'they' as well. When Beta left to find Era, Gamma did research on him, and even asked Era's children. All said he died. On the search, he got captured by Cepheus and Adonis. After the base exploded, everyone got revived, fused, fought Cedous, they finally rested at Greek Home, only to be killed again when Maw exploded it.
There's a line because 1 side is his boy side and the other is her girl side. Music: https://www.youtube.com/watch?v=_AQ4NAADmdc
