Kelsey is a feisty, competitive and passionate tomboyish middle school girl. Despite her playful teasing and light-hearted demeanor, she can also get very serious and determined about her favorite sport, volleyball. 

She can be very bold and confident, as shown when she swiftly took over Emily’s failing introduction speech to the school. While she does not like losing, she never lets it get her down, instead gets motivated to practice harder and win. 