AncientMermaidmon

AncientMermaimon, a fictional character from the Digimon Frontier series, is an Ancient Sea Beast Digimon with the power over water. The power AncientMermaimon possessed lives on in the Digimon that became Ranamon via the Spirits of Water created by AncientMermaimon.

Description
She wields a golden three-point trident and can manipulate the waters of the Net Ocean to her will.

Digivolution

 * Rookie (Child) - Ranamon
 * Champion (Adult) - Calmaramon
 * Ultimate - Mermaimon
 * Mega (Ultimate) - AncientMermaimon

Attacks

 * Great Maelstrom: the nearest body of water closest to her becomes a raging tsunami which destroys all but the very strongest foes.
 * Crystal Billow: causes shimmering crystalline structures to erupt from beneath her enemies.
 * Ocean Waves: manipulates the tides of the net ocean which create destructive waves.

Digimon Frontier
She was one of the Ten Ancient Warriors that saved the ancient Digital World from Lucemon's treachery.