Some of Ji-Young’s personality comes from her puppeteer. Kathleen Kim, 41 and Korean American, got into puppetry in her 30s. In 2014, she was accepted into a Sesame Street workshop. That evolved into a mentorship and becoming part of the team the following year. Being a puppeteer on a show Kim watched growing up was a dream come true. But helping shape an original muppet is a whole other feat.