*NEW* Survivor - The "Knight"

The story video of the new survivor, "Knight" (Richard Sterling), revealed:

The Sterling family is an aristocratic family that runs a huge underground industry, but the head and his wife have not had their own children for many years. After breaking off relations with her former partner, Mrs. Sterling gave birth to twins, and when the twins were four years old, the two children suddenly disappeared.

In order to find the children, they atone more devoutly. The sister was soon found from the hands of the former "partner", and the brother was not found until three years later.
On the day he came back, the brother sang the nursery rhyme he sang when he parted with his sister. The nursery rhyme was a game that the two often played when they were young - knights and princesses. With the details of the nursery rhyme and the boy's narration, the sister also recognized the boy.
The two children are still innocent and cute, but only the sister who used to accompany her brother day and night feels that something is wrong. Until one day, she discovered that this "returned" brother was always lying.
He led the servants to the rooftop and asked the housekeeper to move the ladder away; he spread the malice between the children and aroused everyone's hatred; he dug up the information about the black industry that his father was still secretly running, causing quarrels between his parents until his mother tried to commit suicide...
Only the elder sister knew these things, but the "brother" always said that he loved her the most and would not let her tell anyone.
"Only when this world is bad enough will they cherish us who symbolize 'hope'."

The younger brother always watched the fights caused by "lies" in secret, like a king who planned war and held chess pieces. But he seemed to be often lost in thought, as if troubled by some problems.
The elder sister finally reached the age of marriage. Knowing all the secrets, she even wanted to escape from this "brother" of unknown origin.
But on a sunny afternoon, the younger brother pushed her down the stairs.
"As long as you can never leave, I will always be a 'knight', and you will never go to the outside world."

It was not until then that people discovered his evil deeds. Everyone used to think that he was just a child who liked reading, knight dramas, swordsmanship and war books.
The parents finally discovered that the brother's face had been scratched out of the family photos before the age of four in the old album and replaced with "Richard's" face.
In the end, when the sister went to the Red Church to attend the wedding, Richard was locked up in the confinement room. After the wedding, the sister disappeared, and as for the Sterlings, they slept forever in the tower of the mansion.

Richard Sterling, who inherited all the inheritance, still had a polite smile.
Singing the ballad of "Knight", he embarked on a journey to find his sister.