It's possible you're thinking of a character from a specific book, movie, TV show, or game. To help me identify who you're referring to, please provide more details:
* What kind of story are you thinking of? Is it fantasy, science fiction, historical fiction, or something else?
* What is the character's name, or any other clues about their appearance or personality?
* Do you remember any specific details about the story, like the plot, setting, or other characters?
With more information, I can help you pinpoint the time traveling alchemist you're thinking of.
