Black Beauty Sisters

The Black Beauty Sisters (ブ ラ ッ ク ビ ュ ュ テ テ ィ ー シ シ ズ タ ー ズ ズ, Burakku Byūtī Shizutāzu, Black Beauty Sister) are a duet that appears during the two seasons of Mermaid Melody. They are two sisters who were originally rapes but were turned into "human" by Gaito.

Profile
Age: 18 years (Sheshe) and 14 years (Mimi).

Birth: February 16 (both).

Sex: Female (both).

Species: Human (rape fish originally)

Relationship:' Brotherhood

Dubbing:

Sheshe
Sheshe (シ ス タ ー シ ェ シ ェ, Shisutā SheShe), is the older sister. She is tall, with long reddish orange hair and tied in a ponytail with snaps on both sides of her face, a red horn in the middle of her head, red hippocampus ears and blue eyes. She is the sister who commands and dresses the color of her hair, red. He has a golden dot on his forehead as an ornament.

Mimi
Mimi (シ ス タ ー ミ ミ, Shisutā MiMi), is the younger sister. It is lower, with light blue hair and short with spikes that cover the entire front, red eyes, blue hippocampus ears and two blue horns on the head (one on each side). He usually listens to his sister and wears blue like his hair. He has a golden dot on his forehead as an ornament which is not seen unless he sings and his hair moves. Mimi has spines on her arms and neck, both of them wear a suit with the color of her hair and also, Mimi has small fangs

History
The Black Beauty sisters are humanized fish that were transformed by the power of Gaito. They have primarily human form, but they have small horns, hippocampus ears and fangs.

They are very powerful and can almost defeat Luchia, Hanon and Rina, being one of the few villains that could come to cause them real serious problems. Their powers are, according to them, to be beautiful and to sing to the darkness. However, when they sing their songs separately they do not have any kind of effect. Their song weakens both the mermaid princesses, who get to catch Karen, but the other princesses rescue her thanks to a new song by Aqua Regina that does affect the two sisters (their previous songs did not affect). Their songs are always sung in duet between the two, and they are "Kuro no Kyousoukyoku" (Concert in the dark) and "Yami no Baroque" (Dark Baroque).

After repeatedly failing, Gaito ends up returning them to their original form of fish (rapes), but Lord Mikel returns to transform them with his power in the second season to help him fight the princesses. In the second season, Mimi goes to the world of the humans after a fight with his sister and under the name of Maddy becomes friend of the sirens reason why it convinces his sister to betray Lord Mikel and in the end ends with them leaving them after Mimi tell her sister the secret of her siren friends.

Curiosities

 * They are the first devils that sing and have two songs
 * They have the opposite color of eyes and hair (Mimi has red eyes and blue hair and Sheshe has red hair and blue eyes)
 * They captured Karen in the first season, however they only used her as a trap because she did not have her pearl
 * All the devils do not like their ideas or their presence
 * Apparently, Sheshe can hypnotize like she did with Subaru
 * They betrayed both Gaito (stealing the yellow pearl and indigo) and Mikeru (rebelling against him before being absorbed)
 * During their fight with Lord Mikeru, it can be seen that the sisters' song, The Concert of Darkness, hurts him, it may be because, like Mikel, it is of the ancestral race from which the mermaid princesses come, and like them it affects the songs of the Black Beauty sisters, it could also hurt Mikeru, if they had a stronger song they would have defeated him.
 * During the 47th episode of the first season, you can see that when singing the concert of the darkness, they do a pose of more, moving their heads from top to bottom to the rhythm of their song and it is not seen in other occasions.