|Type||Aquatic Beast Man|
|DigiFuse forms||Shoutmon X7 Superior Mode|
|Voice actors||(Ja:) Yuka Shioyama|
Mermaimon is an Aquatic Beast Man Digimon whose name and design are derived from the mythological mermaid as well as the pirate. She lures the enemy with her beautiful voice and good looks before going on the offensive.
Mermaimon is the first mate of Olegmon's Gold-Thieves crew. She is battled and destroyed by JetMervamon during the Xros Heart United Army's rescue assault on Olegmon's ship, causing Olegmon to go into a berserk rage. During the final battle with DarknessBagramon, she is revived by the Code Crown, and digifuses with Shoutmon as part of Shoutmon X7 Superior Mode.
- Northern Cross Bomber: Creates a replica of her anchor and launches it at her enemy.
- Anchor Blitz: Kisses her anchor and slashes an energy wave at her opponent.
- Charm Plunder