Pure Mermaid (ピュアマーメイド), known in English as Oceana, is an MAR-type Medabot that first appeared in the original Medarot game.
Oceana is a Medabot based on a mermaid, with long blonde hair, pink fins, and a fishlike tail allowing her to move freely in the water. She specializes in repairing damage to her allies' parts, making her very useful as a support-type Medabot.
Oceana is usually depicted with a pair of small sea angels hovering above the palms of her hands, but these are missing in some of her game appearances.
In the games
Oceana is an aquatic-type Medabot that uses "Repair" actions to restore her allies' unbroken parts. In Medarot 1, 2, R, and 2 Core, her parts have the "Recovery" attribute, making her an obvious choice for use with the Mermaid Medal.
In Medarot 1
Oceana is a generic enemy Medabot in the original games, never much of a threat on her own. Her main ability is to heal herself and her allies, although she is at severe disadvantages when built as a whole.
Oceana's arms are the fastest "Repair" parts available in Medarot 1, and her head is the only part in the game capable of repairing multiple parts at once. Unfortunately, only her Leg Parts can be obtained through normal gameplay, as a reward for winning a battle with the gym teacher in the post-game. The rest of her parts can only be obtained by trading them from the Parts Collection games.
In Medarot 2
Oceana's parts are not normally obtainable in Medarot 2, and must be transferred over from Medarot 1. She was replaced by the new MAR-type, Maitin.
In Medarot 2 Core
Oceana returns as a generic enemy Medabot, still not a threat and retaining the same abilities as before. She appears in the same context Maitin did in Medarot 2.
In Medabots AX
Oceana is Julie's leader Medabot, but she has Pateri Vulcan instead of Cure Hand. Her parts are seen everywhere.
The player must start with All Repair.
In Medarot DS
Oceana's Head Part now uses All Repair, which heals all parts simultaneously.
In the animeMetabee finds a stray Mermaid Medal on the ground, they try to find the Medabot that it belongs to. They try teleporting the body with Ikki's Medawatch, but it doesn't work. Instead, they decide to place said Medal in Brass's body until they can find it. They find out her name is Oceana and she is being held captive.
Throughout the episode, Metabee falls head over heels for Oceana. She is sweet, shy, and an almost too-good-to-be-true damsel in distress but his heart is broken when she leaves after being reunited with her owner, Hannah.