She was removed as an admin for the most extraordinary level of bullying. She continued bullying right up to when she was finally indefinitely blocked. I was one of the people she bullied. She had a coterie of rabid followers and so was allowed to run riot for years. There were many, many good editors who left because of her behaviour.

What did she do on Wikipedia?

She "fixed" barelinks and did categorization work. On the former, she wrote a script that utterly buggered up links to the extent they were being cleaned up long after she was banned. On the latter, she was so toxic that she was eventually blocked for her actions on categories.

She was a toxic editor who did virtually no editing of content on the site.