Gamia-3
One of the three Gamia sisters—a trio of assassination androids deployed by Baron Ashura to take down Kouji Kabuto. She's the third of the group, though calling them "sisters" is more about function than anything else.
In the original series, the Gamias don't make it very far. But Shin Mazinger rewrites their fate: Q3 is the sole survivor of the trio and gets rebuilt, eventually becoming Detective Ankokuji's partner and switching sides to work with the protagonists. It's basically her redemption arc before the term was cool.
Content compiled by AnimeList.moe from publicly available sources.
