The scarlet king is an ancient deity intent on crossing into our reality from a second dimension. This demon will be born to a human bride, hiding itself within the soul of the human child until it is ready to take the body for itself. An organization known as the SCP foundation has contained this child and uses it to battle paranormal activity. They place a seal on the child to keep the demon locked away permanently. However, through the secret actions of a cult, the child escapes the facility and sets out to live a normal life.
The seal placed on the individual can only be broken through acts causing extreme physical, physiological and emotional stress, ie, suffering. However, this seal is a complex lock that requires multiple steps to be broken. This character was born specifically for the purpose of suffering, which must be spread out over long time periods, occuring cyclically. The person must feel the ebb and flow of happiness followed by pain, experiencing the highest points of happiness and satisfaction, followed by devastating loss. The cult takes an active role in his life behind the scenes, influencing events around him. Ex. Settles down with a wife and children, but ends with them being brutally murdered in front of him, only for it to happen again years later with a new family. The devastation from multiple tragedies would ultimately break him, allowing the demon to break it's seal and take control.
Tragedy is meant as a form of self development, in which the character has a bad occurrence , goes through changes and grows because of the experience. However, having things happen one after another would seem like the actions of a malicious author simply trying to provoke sympathy by creating edgyness. This devolves into torture porn and gets tiresome and unrealistic. How can you use multiple tragedies without overusing it?