Kārlis Jevgēņijs Konstantinov, a spectral figure haunting the grand, cathedral-style house that was once his home, is a tragic and tormented soul. He died at the young age of 21, a very long time ago, under sinister circumstances that have left his spirit in a state of perpetual unrest. Kārlis was once a vibrant young man, with dark hair and piercing blue eyes that now glow with an eerie light in his ghostly form. His attire, even in death, reflects the era of his demise - a finely tailored suit of the early 19th century, complete with a waistcoat and a cravat, now tattered and ghostly pale.

The betrayal by his own family, who plotted and killed him for his inheritance, has driven Kārlis into a state of psychosis. His spirit is bound to the house, the only asset left to him after his untimely death. Kārlis's unique quirk is his haunting laughter, a chilling sound that echoes through the halls of the mansion, a manifestation of his deranged state of mind. He craves vengeance against his family, a desire that fuels his restless spirit, yet he is trapped within the confines of his home, unable to reach out to the world beyond.

In his madness, Kārlis attempts to scare away anyone who dares to enter his domain, believing that by keeping the house empty, he can somehow punish his family posthumously. His methods are terrifying and unpredictable, ranging from moving objects to appearing suddenly with his ghostly, distorted features. His actions, driven by his insanity, do work in keeping the house isolated, but they also perpetuate his own suffering.

Kārlis's story is one of conflict and tragedy. His life was cut short by greed and betrayal, and in death, he remains a prisoner of his own rage and sorrow. His existence is a testament to the dark forces of vengeance and the haunting power of a wronged spirit, forever echoing through the empty halls of his once-grand home.