Some examples are the characters' parents and family members (like Linus' blanket-hating grandmother), the characters' school teachers, Charlie Brown's baseball hero Joe Shlabotnik, and Helen Sweetstory, author of the Bunny Wunny books.
Some examples are the characters' family members (such as Linus' blanket-hating grandmother), their educators, Charlie Brown's favorite baseball player Joe Shlabotnik, and Helen Sweetstory, who authored the Bunny Wunny books.