Firstsona: a raccoon dude.
Replaced by: a dragon lady.
Twenty-five years and one gender transition later, she is still my fursona. In the past few years she's gone from being pitch black to being a starry night sky with blue and purple accents (nsfw), also her tits have generally gotten bigger, her tail's generally fatter, and she's often a noodle-dragon.
Sometimes the raccoon still pops up. She's transitioned too. But dragon's what sticks.