Listed in 1940 Mar-Ken Graduation booklet and yearbook as faculty member.
From the 1940 Mar-Ken Yearbook:
Miss Ethel Otto
This rather tall faculty member is one of the heads of the Modern Foreign Language Department. She teaches Mar-Ken students their Spanish and does a fine job of it, making her classes enjoy anything and everything Spanish. Miss Otto received her A.B. at Occidental College. She is also class adviser of the Freshmen.