Katherine Ernst is a senior at Agnes Irwin and plays midfield, defense, and draw. She is committed to play lacrosse at Vanderbilt University. While playing at Agnes Irwin she won the Varsity Lacrosse Most Improved Award as a freshman and her team went on to win the Inter-ac Championship in 2021 and received 2nd place in PAISAA Championship. She played on the Ultimate PA 22 Blue team.