The world has two species: Humans and Beastfolks. While they all have their individualistic traits, these species have their own stereotypes you can follow as an option (you don't have to, but you are free to integrate these stereotypes as part of your OC's worldbuilding if you like).
If your OC is a half (for example, a mix between an Avian and an Aquatic), they can only have one physical trait. So no fish tail and wings. However, you can reflect both sides through personality or skills, for instance, a fish-tailed OC might be a great singer due to their Avian heritage.
Keep in mind that being a Beastfolk doesn't mean they gain the abilities of the animal they resemble. These physical traits are mostly cosmetic rather than practical.
Regular human anatomies.
Jack-of-All Trades.
Can have any hair color or eye color, but please keep it to three colors or fewer.
Normally known to take on management jobs.
Have ears and tail of any furry mammals.
They are well known for their natural charm (the kind that makes them endearing even when they cause a bit of trouble, like a cute animal destroying something).
Normally known to take on careers that make use of their looks and charisma.
Have pointed ears and any aquatic creature's tail (Jellyfishes are allowed, imagining their stings are coming out of their backs. Octopuses are also allowed but their tentacles will not be able to grab things and will only be limited to two tentacles, imagining like a forked tail).
Their tail needs to be constantly moisturized.
They are known to have high endurance and stamina.
They are known to take on physically taxing jobs.
Can be any type of bird, flightless or not. However, regardless of the species, all Avians have small wings, making flight impossible.
Bats are also allowed, though they retain only their wings and not their characteristic ears.
Known to have a wonderful voice.
Avians normally take on jobs that utilizes their voice. Like voice acting, radio host, singer, etc.