Tyche

Goddess of fortune. Tyche was either an Oceanid (daughter of Oceanus and Tethys), or she could be the daughter of Zeus and Hera. Fortuna was the Roman equivalent of Tyche. There was also Felicitas, goddess of good luck; whoever she might have been, she was unrelated to Tyche/Fortuna.

Tyche seemed to work together with the goddess Nemesis. If Tyche gave good fortune to a person, Nemesis would take it away from those who received fortune undeservedly.

I have not found any myth on Tyche.