A former British fort, now claiming independence as a micronation, resides in the ocean. Despite being abandoned by other countries, it remains optimistic about its future. It originally had green eyes to resemble a younger version of England but later changed them to blue. Its hair ranges from pale blonde to dark sandy blonde depending on the artwork. Like all colonies of England, it possesses thick eyebrows.
As the son of a powerful nation like England, it has no respect for him and refers to him as "Jerk England." Although England often tells it to leave it alone, deep down, it does care for it. Sealand was once auctioned off online, with Sweden being the only bidder, making it its property and "adopted son." It is friends with Latvia and Seborga due to their small size and similar physical age.
Sealand has a hyper personality, constantly running around recklessly and freely. Most see him as a little brat, but he claims that one day, he will become an extremely powerful nation that will take over the world. Despite being small, it is made entirely of steel, making it virtually indestructible. Sealand enjoys playing games on the internet, soccer, and chocolate bars. It ends most sentences with "na no desu yo," giving off an enthusiastic vibe. Its nickname for itself is "Sea-kun" when speaking in the third person.