Pujarini Ghosh, who plays a person with a psychological disorder in 'Kuheli', believes this is the toughest character in her career till date. "This is simply because the character that I play has some psychological issues. Showing them onscreen was a challenge. Portraying someone normal is a piece of cake because you see them every day. But to act like someone with a psychological problem requires deep level of understanding," says Pujarini. Revolving around the vampire cult, the film is to release on November 4.