"Hello Kitty (ハローキティ, Harō Kitī), also known by her full name, Kitty White (キティ・ホワイト, Kitī Howaito), is a fictional character produced by the Japanese company Sanrio, created by Yuko Shimizu, and designed by Yuko Yamaguchi. She is the titular main character of the long-running and highly successful Hello Kitty franchise as well as Sanrio's mascot since her debut in 1974, making herself one of the company's earliest known characters. She is also the primary protagonist of the universe named after her. Kitty is portrayed as a female anthropomorphic white Japanese Bobtail cat with a red bow worn on her left ear and usually wears blue overalls with a yellow shirt"

This is taken from the wiki... At this point, everyone should know who Hello Kitty is. The Nice, Kind Friendly Kitty that's while not perfect, always is available for help and does her best to help her friends. So explaining her would sorta be redundant so let's get into Hedgie And Mankey show exclusive character traits!

She's pretty much the same as she is in Hello Kitty and Friends: SuperCute Adventures though surprisingly she takes cues from other media! While Jokingly, Her and Sonic are cousins and they treat each other like family. She is the second most shy out of her trio with My Melody and Kuromi, usually taking a while to trust people she meets, but she always treat people with kindness.

This isn't required but if you can match the voice she has SuperCute adventures then that'll be perfect 

Example: https://youtu.be/5hK90dJgIzo?feature=shared