Overall, Sailor Moon Crystal adheres closely to the manga. Some minor details might differ for the sake of animation or pacing, but the core elements remain the same.
In general, Sailor Moon Crystal is a faithful adaptation. It keeps the key elements and storylines from the manga intact. However, there might be some minor tweaks for the sake of animation or to enhance the viewing experience.
Sailor Moon Crystal is generally considered to be a fairly close adaptation. There are a few minor tweaks and additions for the sake of animation, but the core story remains intact.
The Sailor Stars in the Sailor Moon manga are not transgender. The manga portrays their genders consistently without any indication of them being transgender.
Some characters might laugh. If the fanfiction has humorous elements, like a comical take on their battles or relationships, they would find it entertaining. For instance, if there's a fanfiction where the Sailor Scouts accidentally swap powers and get into all sorts of wacky situations, the characters themselves might chuckle at the absurdity.
Sure, the Sailor Moon manga is finished. It wrapped up nicely, giving closure to all the characters and their adventures. But you can still enjoy re-reading it or exploring related merchandise and media.