Diva

Diva (also known as "Prima Donna/Dio") is the final threat that the heroes must fight in Black Strings Carnival: Last Song. It is the fusion of Ophelia and Lakia. It has four forms and is considered as a god by any standards, also a mecha due to its forms resembling mechs. Is referred as a Female, like the FEAST Comet who was referred as a Male.

Diva I - The Prudence

 * -Has a Green Marine-like monstrous form
 * -Has Red "eyes"
 * -Its Slow but really defensive.
 * -Can destroy Fire-based mecha.
 * -Can Show an aura.
 * -Has no weapons.
 * -Its Element is water.

Diva II - The Justice

 * -Has a Yellow like reptile monster form.
 * -Has Purple "eyes"
 * -Is fast and strong.
 * -Can show an aura.
 * -Can destroy Wind-based mecha.
 * -Has no weapons.
 * -Its Element is Earth.

Diva III - The Fortitude

 * -Has a Red-like wolf or dog monster form.
 * -Has Green "eyes"
 * -Is Strong and defensive.
 * -Can show an aura.
 * -Can destroy Water-based mecha.
 * -Has a weapon which are its fangs.
 * -Its Element is Fire.

Diva IV - The Temperance
All of these mechs have an unmeasurable height, due to its nature as a god, however, there's a variation of all its forms named Diva the Runaway.
 * -Has a Blue-like bird or flying animal in monster form.
 * -Has orange "eyes"
 * -Is fast and strong but lacks defense.
 * -Can show an aura.
 * -Can Destroy Earth-based mecha.
 * -Has a weapon which is its own mouth that can shoot beams.
 * -Its element is Wind.

Diva the Runaway

 * A Bigger and more mechanic and metallic, and destroyed version of Diva's early form
 * It has the four elements attacks.
 * Looks like an Eldritch character.
 * Can be countered with "her" own attacks.

Personality
Diva is the fusion of two beings, however, creating a brand new one personality, Diva is shown as aggressive and really violent, however, is moral and respects the strongest warriors, considering them as fun and interesting, but is a sadistic god which eats human sacrifices for its hunger, that's why Ophelia was so obsessed with sacrifices.

Trivia

 * Diva's name is derived of a role of the "most destacated" female singer.
 * It was awakened thanks to one more sacrifice made by Will Krone, namely a major character.