DAHLIA GILLESPIE (the cultist)
Original dynamic: Mysterious, cryptic antagonist.
Leonard's version:
Leonard would try to rationalize with her like a frustrated professor dealing with a student who believes in astrology.
>“Okay, listen — I respect your right to your beliefs, but summoning an ancient god through ritual sacrifice isn’t exactly peer-reviewed science. And honestly? The robes? Bit cliché.”
He’d be creeped out by her vagueness and might actually get more confused the more she talks.

DR. MICHAEL KAUFMANN
Original dynamic: Shady, morally compromised doctor.
Leonard's version:
Leonard would be excited to talk to another scientist at first — until he realizes Kaufmann is kind of a jerk.
>“You’re a doctor, right? You must have data, notes, anything? Wait — are you high? Are we high? Is this an extended hallucination?”
He’d eventually call Kaufmann out for being unethical and say something like, “No offense, but you’re the kind of guy that gives scientists a bad name. You’re basically Dr. Oz with a heroin problem.”

LISA GARLAND (the nurse)
Original dynamic: Tragic, emotionally vulnerable character.
Leonard's version:
Leonard would immediately fall into an awkward, overly compassionate mode, trying to comfort her while being clearly out of his depth.
>“You’re bleeding… or… melting? Do you need a bandage? I have some tissues. Okay, okay, don’t cry—oh god, I think she’s crying blood.”
He’d sympathize deeply with Lisa, but his scientific brain would be at war with his emotional side, trying to analyze her condition while panicking internally.