| A | B |
| Arthur | The star of the show |
| Buster | The joke-cracking, eating machine |
| Dad | A cater |
| DW | A Mary Moo Cow fan |
| Francine | A sports gurl |
| Brain | His real name is Alan |
| Muffy | A rich gurl that get's everything she wants |
| Prunella | Loves horescopes and is in the 4th grade |
| Fern | Is quiet in school but when she get's her mysteries, watch out! |
| Binky | A sweet bully |
| Sue Ellen | Used to live in Costa Rica and other parts of the world |
| Mr. Ratburn | A tough but fair teacher |
| Principal Haney | The principal at Arthur's school |
| Grandma Thora | A horrible cook |
| Grandpa Dave | Only wants to do things by himself |
| Cousin Cora | A stuck-up gurl who is a show off |
| Mrs. McGraty | The cafeteria lady |
| Mrs. Baxter | Is a writer for the newspaper |
| Mr. Baxter | You never see his face |
| Pal | DW's enemy & Arthur's pal |