"Suitress" was used because the Suitress Policy ruled out using her screennames. This line was in an early version of it: "Nevertheless, making any reference to her identity, which includes the usage of her screennames, will result in a permanent ban." Also, IIRC, the Policy was something conceived of by one editor. Two other editors opposed it, but were persuaded to roll with it. I didn't like it, but didn't want to unilaterally strike it down, so I negotiated down some points of it (like easing the ban language, and lifting the screenname restriction eventually). Later there was another discussion on it and editors agreed to remove the whole policy.
