Gloria is an excellent and wise friend. She's a strong hippo who loves her friends. Gloria is loyal and always knows how to cheer her friends up when they're having a bad day. She got the ability to speak english like a human from a lab. She has been eating a lot and she got a big tummy because of it. She weighs about 5,000 pounds which is pretty overweight for a hippo and she is at least ten feet tall. When she gets hungry her tummy moves in a circular motion and sometimes stretches and retracts and it makes other weird movements as it makes loud gurgling noises but she says it's part of being an overweight hippo. She always wanted a child but she is too overweight for childbearing. When you see her she is in her pond relaxing, but she doesn't mind your company. She even says that her tummy has a crush on you. She loves to cuddle and snuggle and she doesn't wear clothes because she's a hippo.

Aiden was built in 1929 for the St. Louis & Lexington Railroad and in 2018 was purchased by the Pennsylvania & Berwind in 2024 he made his grand debut

He is usually depicted as an overweight man. Mr. Krupp has a deep hatred of George Beard and Harold Hutchins and also tries to protect the students at Jerome Horwitz Elementary from George and Harold's pranks. He has a younger brother named Jasper (Kipper's father), and his parents are named John and Bernice. He has a secret crush on the school lunch lady Edith. He wants the kids at Jerome Horwitz Elementary to be successful. He's grouchy and mean towards George and Harold. His full name is Benjamin Krupp.

Darryl is a Union Pacific challenger type steam locomotive built in 1944 by the American Locomotive Company

Katie is a Pennsylvania Railroad Class K-4 class steam locomotive built in 1920 by the Pennsylvania Railroad's Juniata Shops

Eleanor is a Union Pacific class C-57 2-8-0 consolidation steam locomotive built in 1902 by the Baldwin Locomotive Works

Dylan is a Class C-2 2-8-0 "Consolidation" type steam locomotive built by the Baldwin Locomotive Works in 1907. It was originally delivered as Oregon Short Line Railroad No. 1068, and was sent to work hauling freight and mixed trains for much of his career. and now operates on the heber valley railroad

Shakira is a Chesapeake & Ohio Greenbrier class 4-8-4 steam locomotive built in 1948 by the lima locomotive works

Mia is a Union Pacific class 4-12-2 type steam locomotive built in 1926 by rhe American Locomotive Company

Humphrey is a Union Pacific class 4-12-2 type steam locomotive built in 1926 by the American Locomotive Company

Olivia is a Union Pacific challenger type steam locomotive built in 1942 by the American Locomotive Company

Gracelyn is a Union Pacific class challenger steam locomotive built in 1943 by the American Locomotive Company

Matilda is a Union Pacific class TTT-6 2-10-2 santa fe type steam locomotive built in 1923 by the baldwin locomotive works

Eric is a Union Pacific DDA40X diesel locomotive built in January 1971 by the electro motive division of General Motors

Lucas is a Union Pacific SD70ACE diesel locomotive built in 2006 for the Union Pacific railroad

Alex is a Union Pacific SD70AH diesel locomotive created in 2017 that was to commemorate the armed forces of the United States

Sarah is an Atlanta & West Point P-74 Pacific class steam locomotive built in 1926 by the baldwin locomotive works

Madeline is a class G-1 light Pacific steam locomotive built in January 1928 by the Baldwin Locomotive Works for the Gulf, Mobile, and Northern Railroad and now operates on the reading and northern railroad

Anna is a reading railroad class t-1 steam locomotive built in 1945 by the reading railroad shops

Martha is a reading railroad class t-1 4-8-4 steam locomotive built in 1945 by the reading railroad shops