You can access the Character Sheet by pressing C in the game.
You can view your level, power rank, battle level, class, mastery, player stats, change your equipped styles, costumes, flasks, allies, mounts, wings, tomes, mag riders, ships, sails and fishing poles from this menu.
Power Rank: Character level, mastery, equipment, and unlocked dragons all contribute to create your power rank.
Character Level: Displays the level of your current class.