Maria Mazzini

 was

 was the sister of Carlo Mazzini and worked in the perfume and cosmetics business. She owned a factory on the planet Suganda. She was the aunt of Angelo Mazzini, brother of Francesco Mazzini and was the mother of twins Peter Mazzini and Paul Mazzini as well as the aunt of Joe Mazzini.

She came to Argentia for her brother's funeral but was mostly interested to see whether she had inherited her brother's valuable estate.

She was eventually murdered by her nephew Angelo Mazzini through a tiny bot that injected hydroxatine.

She claimed to have been married several times. She also liked to collect porcelain cats.

She attempted to seduce the Doctor during his investigation into the mysterious deaths occurring aboard the Argentia.

In a potential future timeline that Angelo illegally observed, she was killed by her sons Paul and Peter when a piano was dropped on her so they could inherit the estate. (AUDIO: Serpent in the Silver Mask)