Scene (after a long, otherworld-imposed-on-our-world, "spiritual threat", demons, ghosts, spirits, that sort of thing conflict, magic, whatever, culminating in a huge throwdown between Our Heroes and the Main Villain who is tied to a human body and wreaking major spiritual havoc): Battle goes down. Main Characters A, who is "third eye open etc etc", is battling MV. This goes poorly for MCs A. MV swells huge, monstrous, bad shit happening all around, "NOW YOU ALL SEE MY TRUE FORM" kinda statement. Normal folk can see it, no longer subtle. MCs A look totally buggered. Secondary (Yet still Semi-Main) Character B is either expressionless or unimpressed. SCB walks up to MV, knees him in the crotch, and procedes to beat the man bloody, then chokes him unconscious. During this, MV is throwing endless amounts of ... evil power? at SCB, without noticeable effect. After MV unconscious, SCB retrieves a gun (or knife or sword, large stone, knitting needles, electrical cables, whatever fits the world setting for the scene) and perfunctorily executes MV. SCB "I don't see things."

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It's like the robot and the rubble scene. In conceptual context, it works all right. Would play SCB as the unsupernatural-powered of the characters, though not in the comic relief or poor unenlightened theme or "Yeah, well, I can't do that, but I can do THIS!" ninja/richman/charmer/etc bullshit, but still competent and adding to the general effort.

Of course, in my head, it's a group of neighborhood kids in a white-picket-fence poor neighborhood in the summer and a showdown with the boogey-man or spooky tree or Dead Dollar Man or the Three Step-Fathers/Step-Mothers or the shadow bugs or something with that odd, urbany supernatural feel. None of that "Children see things that adults can't see because innocence, sense of wonder, yadda yadda."

Don't know if they do, but more, they've a lot of free time, perform endless little rituals, and have a different type of accepting-what-they-see style (though they're not as "open" or accepting of anything as they are always presented. They're often sharper than they look) so they might encounter things differently.