One person acts like the latter and in every one man in the family tree always acts the same, from behavior, demeanor, tone, and mature from birth to old.
Little did one know, he was the ancestor of the family that has been reincarnated whenever the first son is born, protecting and making the family prosperous never letting it fall.
Another person acts secretly in the dark, leaving pools of blood in his way, not only is he professional, he is also the best of the best, a genius not seen in a century, undoubtedly with him alone the family could stay in the shadows until the twins appeared.
Two bodies, four souls, both can be mistaken for each other as they are not only identical, they're well versed in becoming each other thus whenever one goes the other follows, so every move they made synchronize with each other, with two twins, there are bound to be a dark secret.
In the day two souls of a child occupying the body of the twins, at night. Another two souls occupied the body but switched through day and night, if the day twins are said to be children who wore masks of malice hidden in playfulness and childishness, then the night twins are to be twisted and more darker with no room for laughter and seriousness is plastered on their face.
In this family of dark and evil, a young flower blooms in the day where sunlight basks in light filtering its evil, though saintly and tries to teach her siblings the right way and tells them stories when they sleep even when some of them have grown up, she is good at maintaining her prestige and reputation to hide her dark secret that she never want her other siblings to know.
When she was young, she was a loving and caring sister just like today and became a saintly figure who helped the common people and the kids at the orphanage. On the way home she spotted her baby brother in the arms of her older sister, ready to throw her into the river by the bridge.
Planning to stop her sister's evil plan, she ran and stopped her sister until she heard the truth from her. Just like what she expected, her family was not clean even though her ancestors had stained their hands with blood, and this little brother of hers is said by her sister to be the incarnation of evil that will plague the house, turning it upside down, orcastrating a way for them to kill each other.
She was a kind and evil heart, always to easily trust lies turned a blind eye and allowed her sister to continue her plan, but when she saw her baby brother was thrown away she saw him cry, the cry of the baby was loud and she had to escape the place with her sister.
From that day on she carried a sin in her heart, the deepest sin that she could never erase, so to not be reminded by it every time she had to focus her attention into something that would purify her sins.
And she became a saint.
The thrown baby survived, he later would later find his way to the house and join the organization founded by her sister who had thrown her in the bridge who was witnessed by her saint sister.
He would not take revenge, as the family's blood trailed in his body, he merely thought of it as a challenge brought by the family to adapt to the outside and act as their spy.
A terrifying family that birthed monsters, for they are indeed a little strange.