2.
The first thing that clues her in is the sight of someone unfamiliar on her front doorstep.
No one new ever comes into this happy little bubble of hers, that's the way it works. Oh, there's been the occasional angel wearing a half familiar face, pretending to be a salesman or a meter reader or a visiting hunter. But she always recognizes the costumes they wear from somewhere in her life, and even if they don't know it, she always recognizes them for what they are; keepers checking up on the animals.
The second thing is the lucha libre mask.
"Subtle," Jo mutters, watching the visitor from the upstairs bay window. "Real subtle, dude." She sighs and tromps downstairs, calling "Coming!" at the second volley of knocking.
When she swings the door open, the masked man puts one finger to his lips and says, "Shuuush!" before swirling his gold cape and bowling past her into her living room. Jo follows him, puzzled and curious.
He inspects the room cautiously, then announces, "Jo, it's me!" with suitable dramatic flare.
Jo raises her eyebrows at him.
"It's me!" he insists, as if that makes it any clearer. Then adds, "c'mon, Jo-glow! They put your brain in a jar when they dragged you up here?"
She stares at him. "…Ash?"
He whips off the mask and grins at her, fluffing his mullet proudly.
"Dr. Badass is in, baby girl."