Maika Monroe may have starred in multiple defining horror films of the last 10-plus years, from her breakout in  It Follows  to the recent box-office smash  Longlegs , but no amount of scream-queen credits could prepare her for the gory terror of  Victorian Psycho .  “It terrified me. I knew that it would be the hardest role that I have ever done — and so incredibly different from anything I’ve ever done,” the Santa Barbara native says. “There’s always a little part of me in roles that I do, something that I can ground it with or connect it with within my own personal life — but this role was really a departure from that. It was working from the ground up, creating this character where I couldn’t rely on my own self. It really, in the most magical way, took a toll on me.…