Kuja, holding some whisperweed

Originally from the worlds of Final Fantasy IV and V, Whisperweed is a plant that always grows in pairs. Any sound that goes into one will come out the other, and vice versa, but it doesn't work if they're too far apart. People that know the functions of these plants use them as natural walkie-talkies, as Kuja and Garland have done in Garland's Lunar Saga.