About 15 hours into “The Legend of Zelda: Echoes of Wisdom,” I came across a character expressing concern for Princess Zelda: “Is she overextending herself for the sake of the kingdom?” I bristled. “Echoes of Wisdom” is the first core “Zelda” game in which the titular member of royalty is a fully playable character. She’s often hidden away, usually in need of saving, her rescuer the green-outfitted swordsman Link. A hero, an ace swashbuckler and an expert marksmen, no one ever wonders if Link is too delicate to save the magical kingdom of Hyrule. Different characters, of course, come with diff…