Lady May is a member of the Court of the Rogue in Corus around 246 HE. She serves Dawull, the chief of Waterfront District. There she is one of the best friends of Aniki Forfrysning. She listened for any word of diggers being hired for her but didn't get any information on Crookshank's second crew of diggers.
She doesn't appear in any of the novels but has only been mentioned once in Terrier by Aniki.