Umineko Tweak has released an updated patch of Rondo and the Witch of Reasoning which gives the game text boxes. Can be found here
The original "Beatrice" and previous Endless Witch before the more well known Beatrice, Virgilia is the name assumed by this character after passing her name and title to her student. Her name comes from the Divine Comedy character Virgil, who guides Dante through Hell and Purgatory to Beatrice, who is his guide through Heaven. A powerful witch in her own right, she is Beatrice's teacher and possesses a connection to Chiyo Kumasawa.