I was wondering: when it was Beth McIntyre the 白鳥, スワン queen, did she play the white swan, the black swan, または both ?

与えられた that the poster outside the theatre showed her as the white swan, and Thomas says that they have never had a ballerina play both the white and the black 白鳥, スワン before, I think it is 安全, 安全です to assume that Beth played the white swan.

Both, of course. She was the prima ballerina, so she had to play both. In some adaptations of the 白鳥, スワン Lake, the white and the black 白鳥, スワン are played によって different baillerinas, but they are usually performed によって the same person. Just because she appears as the white 白鳥, スワン in the poster doesn't mean she only played that role. Nina also appeared as the white 白鳥, スワン in the poster. Besides, Beth was known for her "magic" on stage, so she was able to play both roles and I totally see her dancing the black 白鳥, スワン in her glorious years. Thomas keeps saying it was thrilling to watch her, yet dangerous. I guess he was refering to her dark side, which is what Nina lacks and the Black 白鳥, スワン required that evil side. I think Beth was perfect as the Black Swan, but she played both :)