casual lolita by MandaPlz featuring shoes
I think this skirt is well suited for a casual coord. This outfit would be perfect for a Thursday or Sunday of a convention because you are either just traveling in or out and casual lolita is well suited for traveling. Tea parties (or any lolita style flat shoes) are also good for those driving so you can actually feel the pedal and of course, are suited for walking around big conventions.
Pirate lolita by MandaPlz featuring ribbon hats
I saw a coord similar to this in an English Gothic Lolita Bible, and I thought it would definitely work for pirate lolita. To toughen up the tulle skirt, I added a pair of AP boots (which could easily be replaced with a pair of cute wellies or Doc Martens) and striped tights. I think this would be good for a Saturday of an anime convention because it is memorable and easily recognizable , which is vital when finding your friends at conventions. You can easily say "I'm the girl in the pink pirate outfit" instead of "I'm the one wearing the blue Super Magical Rainbow Unicorn Colony dress" which could easily confuse your non-lolita friends.
Fairy Kei Lolita by MandaPlz featuring hair clips accessories
The tulle skirt resembles a fancier tutu skirt and would be totally awesome for fairy kei. This outfit would be good for a Friday because it is still casual because of the cozy socks and ruffled sweat shirt, but the wig makes it seem more dressed up (and lets you try to sleep in more instead of curling your hair). I couldn't resist the putting the cute mint shoes in the coord(despite how inconvenient they would be for a convention), but the shoes could easily be exchanged for high tops or if you also change the star bag to a cute tote bag, you could pack a pair of flats for when your feet start to hurt (this is what I do).
I hope this is helpful to experienced con-goers and newbies alike~