Here is our character chart for Extraordinary You which is what we use to remember who each person is, what their initials are, and what their characters title/job is. I go back and forth between using names, initials, or job titles depending on how fast I’m typing or if it seems like a paragraph is turning into character soup.
The Character chart can be kind of spoilery at times because we go by character descriptions from the website while creating it, so tread with caution. Also, writers in Kdramaland tend to change their storyline around midway through, so these initial character descriptions and maybe even names might (might!) not match later episodes. It has happened before. But, that’s also part of the fun sometimes.