Testament is a popular recurring character on Guilty Gear who was introduced as the adopted child of Kliff Undersn. Among other things, they have the power to wield blood magic and can do a lot of damage with their crimson scythe, which they always take to battle.
Testament fights alongside Succubus and EXE Beast. Prior to their appearance on Gear, Testament used to be a noble soul, always considering the needs of other people before they considered their own.
The forced conversion, however, changed everything. They became cynical and distrustful of humans. But despite all of these, it is clear that they do not really desire the annihilation of the entire humankind.
Testament guilty gear release time was March 28, 2022, but the character had been announced by gaming news outlets before then. As such, there was quite the anticipation for them. Now, Testament is a veritable fan favorite.