Just don't know...it's been nearly impossible to find any information about his private self, and accounts of his public self vary tremendously. One of his best friends in the early days was the composer and pianist Percy Grainger, himself an eccentric, whose correspondence has been gathered into a book which I hope to obtain through interlibrary loan. The volume is too expensive to purchase. He corresponded a great deal with Ernest, so I hope to be able to glean something from at least a one-sided conversation.
Meanwhile our "interesting" couple:
"The wedding of Mr Ernest Thesiger, youngest son of Sir Edward Thesiger, K.C.B, and a kinsman of the Viceroy of India, with Miss Janette Ranken, daughter of the late Mr R.B. Ranken, of Edinburgh, was arranged to take place on May 29. Mr Thesiger is a well-known and clever actor."
From The Sketch magazine, May 30, 1917