Once upon a time, a little girl named Fuka asked her father to have a little sister with advanced functionalities strong enough to help her take over the world. Several years later... The Prototype known as the "Death/Extermination Submersible Combat Organism" was born (Desco for short). Unfrotunately after DES X was created she ended up being abandoned and was sent to Hades where she was locked up under high security.
She was later released by Axel, thinking that he could control her. Unfortunately Desco takes out Axel in one shot to show how "Final-Boss like" she is and proceeded to fight Valvatorez, Fenrich, and Fuka (the latter being Desco's Illegitimate Big sister (spoilers))
After being defeated, Valvatorez decides to bring her Desco along. She now trains under Valvatorez to achieve her dream to become a "Final Boss". One that'll be able to help Fuka take over the world.
She likes to call Fuka "Big Sis".
Powers and Stats:
Name: Desco (Short for Death/Extermination Submersible Combat Organism)
Classification: Man-made Demon, Supposed Final Boss, Fuka's Little Sister
Powers and Abilities: Superhuman strength, speed, and durability, can use Magic, shape shifting, Flight, can fire lasers, possibly Immortality (Type 1 and 3), can gain stronger attack power the lower her HP gets.
Speed: Massively FTL+ (Comparable to Valvatorez)
Lifting Strength: Likely Class Z
Striking Strength: Universal
Durability: Universe level (Can take attacks from Valvatorez who can fight against Baal)
Standard Equipment: A strange Biological object that is attached to Desco's back (This can be removed and summoned at any time and can transform into a sword)
Intelligence: Average (Talks in Third person when referring to herself)
Weaknesses: Despite Desco's destructive power, she still has a lot to learn so she isn't at her full potential. She also cares for Fuka a lot, so much in fact that she'll do anything to be by her side. Such as overreacting at the fact that Fuka might dissapear which caused her to replicate creating an evil clone known as "Torn Desco", who took over the netherworld to build a "Big Sis Dream Land".
Final Boss Arises- The Thing on Desco's back opens it's two mouths and blast two cyclones on the enemy (One that's ice and one that's fire).
True Godly Weapon- Desco flies high into the sky. There, Desco's "Thing" turns into a Giant Sword that explodes on impact.
Yog Sothoth- Desco turns into a giant tentacle monster (possibly her true form) that bites at the enemy with her tentacles, all before blasting them away with a beam attack.
Final Boss Setting- A passive evility that gives her a 20% attack boast for every adjacent ally.
Three Transformations- A passive evility that increases her attack power by 20% after her HP drops to 2/3 its maximum, and again below 1/3 its maximum.
Magichange- Desco transforms into a sword.
Evil Sword Balmung- Desco (while in sword form) enlarges herself and her wielder does a large swing (this can be enhanced even further so that she's capable of slicing planets in half).
Martial Transformer- Desco and whoever's wielding her wail on the opponent mercilessly.