Ooh, scary child! Scary child would be scary even without the kohl, but doesn't the kohl help?
What is kohl? It's a mixture of soot and other stuff that some South Asian and African people (and silent movie stars and young rock stars) wear to accentuate their eyes. It's been around since the Bronze Age. Egyptian queens wore it. It has been believed to have anti-bacterial properties, and, like the smears on football players' faces, it helps deflect the sun. The Prophet Muhammed supposedly applied it before going to bed. It's used even on infants. It protects against the evil eye. Some traditional recipes use heavy metals and can cause lead poisoning. Other ingredients might be lamp black, goose fat, frankincense, the soot of burned sunflower seeds and almond shells, and castor oil.
Tigers wear it.
And it's cool.
I've never worn it. I have no make-up bravery. I've been applying the same mascara, brown eye liner, and smudge of brown shadow for, er, I don't know, 15 years? Kohl eyes wouldn't really suit my pajama-esque housebound writer's apparel (not that pink hair does . . . actually, pink hair goes with everything)! But look how cool and exotic it is when worn by cool and exotic people, including men:
Incidentally, one of my characters is cool like this, which is why I am thinking about it at all.
It's good to be a writer. Your characters can be cooler than you.