Take a look at this. It's a feat that level 1 characters can take in Pathfinder first edition to have tails when they normally aren't supposed to, like if they are humans and so on.

Patch was made for Pathfinder 2e, where no feat like this specifically exists... but in any case, I opted not to give him a tail when I designed him. But, look at it. It looks so good on him. At the least, outside of this specific PF2e game, he should have it. He deserves it. A reward for his connection to the wild.

...Don't worry about the inflated one. That's not something I want as part of his design.