Gertrude Stein, patron of the arts, was a voluble conversationalist when artists and writers visited her Paris apartment in the 1920s and 1930s.
Form google dict., voluble means <em></em><span><em>Speaking or spoken incessantly and fluently.</em></span>
Answer:
Spectator
Explanation:
Spectator is defined as "a person who watches at a show, game, or other event." This definition is closest to "one who watches," so this is your answer.
