It’s probably Michelle Bowman. Trump nominated her for Vice Chair of Supervision.
“The Federal Reserve Office of Supervision is not a specific office, but rather a function within the Federal Reserve Board, specifically the Division of Supervision and Regulation.”
The Vice-chair for Supervision gets a grand total of zero votes on Fed policy. Policy is set by the Federal Open Market Committee, which is headed by the Chair of the Federal Reserve of the United States and consists of 12 governors and reserve bank presidents.