Board Thread:News and Announcements/@comment-3551173-20140302202949/@comment-6697950-20140303100708

The point why Yui was chosen was not because of her impact on the story or to Kirito and Asuna. The point is that Yui is a Navigation Pixie in ALO, i.e. a personal assistant that provides information to the player, thus she perfectly suits the role of "guiding" wikia readers to information pages. Kirito or Asuna cursors would be random pictures that wouldn't fit the theme.