|Name: Sheshe (シェシェ Sheshe)|
|Age: 17 (dead)|
|Race/Species: Water Demon|
|Hair Color: Redish Orange|
|Eye Color: Light Blue|
|Hobby: Singing, Teasing Mimi|
|Favourite Color: Red|
|Image Songs: Kuro no Kyōsōkyoku, Yami no Baroque|
|Family: Mimi (Sister)|
|Friends: Mimi, The Mermaid Princesses|
|Enemies: Gaito, Mikeru|
|Voice Actress: Miki Tsuchiya|
|Position in the Series: Villain|
Sheshe ( シスター シェシェ: Shisutā Sheshe) is the oldest out of the Black Beauty Sisters. Her younger sister is Mimi.
Sheshe is the elder sister of the Black Beauty Sisters. Sheshe is a mercenary of Gaito, not in love with Gaito like the Dark Lovers, but only willing to cooperate with Gaito for personal gain (more specifically, a piece of the 7 oceans). The Black Beauty Sisters are the most powerful servants of Gaito, with a singing voice so strong that the mermaids can barely stand to listen to it. She is more powerful than Mimi, because she has demostrated all the powers that she has and more powers that she hasn't demostated. The reason the Black Beauty Sisters must align with Gaito is because they, like the Dark Lovers, are also transformed by Gaito's spell. Sheshe's true form is that of a demon anglerfish.
Sheshe has red hair tied in a ponytail and blue eyes. She is seen usually wearing a red leotard with a strap that is tied around her neck. She also wears gray fishnet stockings and black knee high boots.
As Sheshe is a villian she acts in evil ways in order to capture the mermaids. She will get angry if someone says something bad about her. However, she has a nice and caring personality towards her younger sister and they barely ever fight.
Please check Sheshe's gallery page.
Sheshe's voice actress is Miki Tsuchiya.