Snowblazer
I thought of that, however I have bad luck with papers in binders and those hole supports don't work
If you wanna try super hardcore mode and turn your character bibles into actual notebook-type things without having to worry about holes tearing, then you might look into perfect or bound binding. That's what I'm doing for other projects, because it's badass.
Simplest way would be to line up a stack of your papers and spread some PVA glue (like Elmer's) into the spine side. Keep the stack good and flat so the binding isn't loose. You can also wrap a cover around to protect it or gussy it up. I imagine you can do this with plain 8.5x11 sheets, but I've had great results with folding those in half to make 5.5x8.5 sheets, and making the folded edge part of the spine. There are ways to print pages so they're double-sided and have two separate pages per side.
Sewing signatures into a hardcopy is way overkill, but the end result is pretty awesome. There are tutorials online for both of those, though the perfect binding is basically you making a homemade, possibly pre-filled notebook.
Just an idea, even though it's more of an arts and crafts thing.