Rosie

Rosie is an upcoming character with some affiliation with Alastor.

Alastor
Their relationship is similar to that of Jack and Mary's relationship from Mary Poppins Returns.

Trivia

 * Vivzie says Rosie and Alastor's relationship is similar to Mary and Jack's relationship from Mary Poppins Returns.
 * Vivziepop mentioned in her Vivzie Streem #9 live stream that she can't give information on Rosie because it's a heavy spoiler and also because she is an important character and is important to the plot.