My fursona is a twist on Chinese mythology, zouyus. They're huge big cats, usually tigers, who look fierce and intimidating but are actually super freindly and are a sign of peace and prosperity. They usually have very long tails and are vegetarians. I added hand-like paws to my gal and made the species to be any kind of Panthera, they also have a few other little details that make them different from the the actual folklore but doing their whole history I made up would take up a lot of space lol. I've always kinda wanted to make them an open species but I also want my girl to be unique so I've just kept it all written down and in my head lol.
Usually people have no idea what my fursona is, I tell them her base shape is a lion with a few tweaks.