Well, after some consideration and talking with people, it seems I should add some more things.
First of all, I do only support Luna. I dislike Misora greatly and always have.
Next, yeah, Misora's name means Beautiful sky while Luna's name means Platinum Moon (Well, with her last name. Misora's last name doesn't really add to her first). Moon has more contrasts with space unlike the sky.
Also, you can't object somebody's opinion unless you want to look like a narrow-minded jerk, not to mention a hypocrite.
For why Misora tends to have a big role in the calendars, for crying out loud, she's Harp Note aka the "Roll" of the game, so yeah, she'll ALWAYS have big parts in the calendar as she's Rockman's counterpart. Please realize counterpart doesn't always mean a couple, like how a lot of the new Tribe wallpapers have Bly and Rockman/Solo and Subaru, counterparts (though, in a villain sense rather than ally) yet again.
Sanct - Luna is the type who would risk it, as she wouldn't take suggestions from people she didn't have some trust or faith in. She's not one to just trust in other people's words as she isn't the type of girl who likes to depend on someone, which makes sense when two people who she should be able to depend on at her age are more or less never around.
I won't say much more, mostly because it's Valentine's Day and I don't need to get frustrated before dinner