According to tradition, Rais was the daughter of the Christian priest Peter in Batan / in Tabne / Tamman near Antinoë. At the age of twelve, she was introduced to a nunnery. During the persecution of Christians under Emperor Diocletian, she went to a well to draw water with other nuns. On the way they saw a ship with nuns, monks and other Christians in chains, who had been captured by the governor Lucianos / Culcianos and were now brought to Alexandria. Rais went, insulted the governor and insisted that she too be killed; so she too was captured and taken to the ship. When this reached Alexandria, Rais was one of the first of the companions to die after confessing her faith before Lucianos and spitting in his face. She was tortured and beheaded.
Joachim Schäfer: Article Raïs von Alexandria, from the Ecumenical Dictionary of Saints – https://www.heiligenlexikon.de//BiographienR/Rais_von_Alexandria.html