Heartsping is nice and kindhearted. She has a girly and feminine attitude, likes to act cute, and occupies herself with various activities, like having tea with friends or striking cute poses. She also loves her friends: she likes to make them happy, even though it sometimes makes her hide things or follow them even though she doesn't want to. She can be immature like her Royal Teenieping colleagues, as she likes to follow her instincts without thinking of the consequences, but she can also be more mature when the situation demands it. In Twinkle Catch! Teenieping, she acts strictly towards the Royal Teenieping students and is dedicated to teaching them about various subjects and imposing order when needed. Heartsping is also smart, given her upbringing as a Royal Teenieping, possessing excellent skills in physics and nursing. She also has extensive knowledge of nearly every Teenieping in the Emotions Kingdom, as she can describe who they are and their abilities. Before she met Romi, she was introverted and listened to a mysterious Teenieping, who stated that Teeniepings and humans cannot be friends. She was shy and nervous, reluctantly ignoring Romi and Marie's request, but she later opens up and is willing to stand up for herself when times are tough.
