We do not know too much about her, but we DO have an incident which was famously told by St. Gregory the Great about her. He writes: Scholastica had been consecrated to God from her youth, and she was accustomed to visiting her brother once a year, at a little place between his monastery and her convent.
One time Benedict went as usual with some of his companions to meet her; they spent the whole day praising God and talking of sacred things. Their spiritual conversation went on, and the hour grew late.