Vampirina

Vampirina appears in episode 3.

https://www.deviantart.com/luisjuarezjiji/art/Mission-Hill-Vampirina-685624254 shows her scene.

https://www.deviantart.com/carolkg/art/Vampirina-479130697 is some fan art.

Jeremy likes her

There is also a book series (beginning with Vampirina Ballerina) that Disney adapted into a CGI cartoon about Vampirina Hauntley, a different character.