Vanessa "Red Nightmare"

About

Gender: Female
Species: Human
Hair color: Black And Grey
Eye color: Violet
Occupation: Mage

Vanessa is the contracted personal mage of Ghislain Perdium. She's the sole and direct disciple of Professor Ronato.Vanessa is an apprentice lacking talent and unable to sense mana.
Despite being taken in by the late Ronato before his death, she is seen as a drain on resources. After his passing, she lives alone and continues to struggle with her magical abilities.
In Ghislaine's past life, Vanessa is a mage who mastered the Mana Breathing Technique, something unprecedented even for Ghislain.

In Manhwa, it was shown that Ghislaine wanted to made Vanessa his mage but she died before he could recruit her.
In Novel, Ghislaine did meet her but unfortunately she was living her last moments and died in arms of Ghislaine. Rather than collecting Bounty of her, Ghislainse set the body ablaze.It was the first and last bit of consideration he would ever show to someone who might have become one of his subordinates.

Vanessa is a bit shy, genuine, and friendly lady. She's eager to participate when it comes to magic research. After meeting Ghislain, she is eager to serve and protect her beloved master. She's determined to become his exclusive Magus who will reach the pinnacle of the Magus, 9th Circle.

(Source: The Regressed Mercenary Wiki)