Board Thread:Spoilers!/@comment-26385535-20160127061149/@comment-25926288-20160206224421

NickyHelp wrote: You know even though 5A is similar to 3B and 5B is similar to 3A, 5a has a slightly similar to 3A and 5B to 3B as well.

For one thing, Robin appeared a few times in 3A, then appears more often in 3B before he became a regular in the rest of the seasons.

Same thing with Ruby when she appeared a few times in 5A and may appear more often in 5B. And possibly she might become a regular again in the next season. Who knows. Nice theory, but we can't use math and logic with a tv show. Red was a regular and will likely not ever be a regular again. No reason to as she has one storyline and that's with recurring characters, not regulars. Robin is a regular's love interest and around regulars, so it made sense fot him to become a regular.