Larkeicus is the main antagonist and final boss of Final Fantasy Crystal Chronicles: Echoes of Time. After absorbing a massive amount of crystals from Sherlotta, he transports the Hero to an interdimensonal area, and a
climatic battle ensues. Afterwards, Larkeicus revives, saying that as long as he has Sherlotta, and thus, the Crystals, he can never die. The young girl Sherlotta rises up, chokes Larkeicus, and summons the Crystal Core. The Hero destroys it, and then, in its explosion, it disintegrates Larkeicus, and warps the Tower out of existence.