She is a nice girl, and she is the secret crush of Max Crumbly and Doug Thurston.
We don't know much about her. However, Erin is a confident yet empathetic girl. She is one of the most popular girls at South Ridge Middle School and has high intellect. However, she has been shown to be slightly rude to Max (as seen in their phone call). She is also the president of the computer club.
Erin is Max Crumbly's secret crush and Thug. It is still unknown if she returns feelings to either one of them.