Calca and Brina

Calca and Brina are enemies in Final Fantasy IV, and later are playable characters in Final Fantasy IV: The After Years. They are the dolls of Luca, the dwarven princess of the Underworld.

Final Fantasy IV
Calca and Brina are fought in the Dwarven Castle when Golbez takes control of them. If left alive for long enough, the two can merge into the more powerful Calcabrina. These dolls were originally harmless toys that belonged to King Giott's daughter, Luca. Later, she expresses frustration when she learns that the dolls were used for evil purposes.

Final Fantasy IV: The After Years
Calca and Brina return in Final Fantasy IV: The After Years to accompany Luca and Rydia on their journey to protect the remaining crystals. Calca is able to use Jive, which cast random enemy abilities on random targets, and Brina is able to use Dance (おどる Odoru), an Ability that casts random White Magic spells on her allies.

Calca and Brina's Band attack is known as "Calca and Brina." It transforms them into Calcabrina and has effects ranging from powerful elemental attacks that affect the entire group of monsters to spells that heals all the members of the party.

During the course of Rydia's Tale, the party is ambushed by the Mysterious Maiden, resulting in Calca and Brina's circuits going haywire. After crashing the Falcon near the town of Agart, Luca is forced to scrap Calca and Brina's bodies in order to repair it. However, if the player manages to obtain a Mythril Nut, a Mythril Bolt, and a Mythril Spring, Luca can repair both the Falcon and the dolls.

Bands
Calca and Brina only have one band including just the two of them aptly named Calca and Brina.

Battle
The Calca and Brina dolls are fought in the Dwarven Castle in Final Fantasy IV. They can merge into the Calcabrina.

In Final Fantasy IV: The After Years, Calca and Brina are fought again.

Etymology
is one of the demons in. His name means "he who can walk on brine."