Penny is generally playful and curious, but at the same time rational and grounded, especially when it comes to training missions. Being the underwater cadet, she knows quite a lot about life in the ocean and likes exploring what is on the bottom.

Like the rest of Team Top Wing, she is kind, caring, friendly and helpful as she is always looking forward to assisting her friends or citizens around Big Swirl Island. She is also resourceful, as she will use her smarts to think of solutions for problems that may seemed impossible to solve.

Despite her laid-back and fun-loving personality, Penny still takes her role as a cadet very seriously as she is not the one to fool around during training missions or actual missions. During these said missions, she is quite observant as she can figure things out through analyzing, which resulted her into realizing things sooner than others. However, because of this trait Penny can sometimes get distracted from something she originally was doing, which can result into her getting left behind.

Penny is rather optimistic and prefers to see the positive side of things. She also doesn't get intimidated by scary situations - in fact, she enjoys taking challenges and is not afraid to face even the most dangerous tasks.

While she is bubbly and sweet, Penny can have just a bit of sass towards people who caused trouble for her. She shows this side through tricking troublemakers or giving annoyed glares to the ones that insult and taunt her and her friends.