The characters of the Undersea Column are introduced as follows:

1. Captain Buck (Barnacles) is a polar bear. He is the bravest and calmest one in the team and is the one whom the team respects. A proud and trustworthy captain. As the core figure and spiritual leader of the team, his bold decision-making inspires every member - they all contribute their unique talents to the team.

Buck is an expert at reading maps and charts. Exploring unknown sea areas and discovering unknown marine life are his magic weapon to maintain high energy. Whenever there is a chase that requires constant and complex navigation skills, Captain Buck must be at the helm in the operation room at this moment. In addition to his excellent leadership skills, he is also the strongest person in the team, but the captain is not suitable for delicate tasks such as packing packages.

2. Chi Chi is an impulsive orange kitten who had a mysterious pirate career. His grandfather was Captain Kacha. He has a bold personality and often talks about his past pirate experiences. Ask him where he comes from, and you'll likely be told a place you can't even find on a map.

Then why did Captain Buck appoint this pirate with a suspicious background as the lieutenant of the team? But what is certain is that Chi Chi is a very brave kitten. He is an explorer by nature and loves adventure and new things.

As a pirate, he is motivated more by his love of adventure than by the pursuit of treasure. Every time he goes on an adventure, Gua Chi will be full of energy and high spirits with his catchphrase "yeow". He turns any situation into an opportunity for a daring adventure! Although he is a cat, he never eats fish.

3. Pisuo is a cute penguin. He is the doctor of the team and comes from a large penguin family. He is the youngest member of the squad. He often takes the legends told by Guji seriously. He doesn't like scary situations (like scary boats, dark caves), but if someone gets hurt or gets into trouble, he's the bravest one in the group.

His big heart wins him over to the support of everyone, from the fearsome large sea animals to the tiny plankton. His courage comes from a heart of caring for others.

But don’t be fooled by his staggering gait. When bandaging is needed, his fins will move at full speed. He is good at wrapping packages, bandaging, tying and untying knots, every time. Every time you do these things, you will say: "Hey, hoo, hoo, ah." You can do these things in one second.

4. Xie Lingtong always observes living things through his magnifying glass. He is knowledgeable and knows everything, and can often find touching details that his teammates ignore. Xie Lingtong is easily attracted to environmental distractions around him. Xie Lingtong is a sea otter, but he is afraid of sea urchins.

He is not good at driving ships and other means of transportation and will be in a hurry when encountering big problems. In the tenth episode of the first season "Undersea Column and Paddlepods", he damaged the manta ray boat. ; in the episode "Lighthouse Jellyfish", he broke the jetpack again. Xie Lingtong is also slightly afraid of heights.

5. Darcy is a dachshund. She likes surfing. She is also the official photographer of the expedition team. She controls the entire team's technological equipment and communication devices. She is a computer expert who supervises the operating system of Octopus Castle.

The images she captured are an integral part of the data collected by the team and are included in the files of the Octopus Fort computer system. In addition to monitoring ship traffic, she is Captain Barker's right-hand man when it comes to ship movements, tracking weather conditions and producing digital spreadsheets.