Blossom is the smartest member and self-proclaimed leader of the Powerpuff Girls she is often seen as the most mature, level-headed and composed member of the group. She can also be fussy, overbearing, vain and overly analytical at times. She tends to protect Bubbles and Buttercup, and often tries to play peacemaker between the two if -they fight, but ironically, she is quick to argue with Buttercup who acts on impulse as opposed to her analytical nature. She is naturally caring to mainly her sisters, but also the Professor and others.
Here is how the character is suppose to sound: https://www.youtube.com/watch?v=qqqFpf9l-OQ&t=70s