What is this kind of Highlight for the hair called?


[![hair
highlight](https://i.stack.imgur.com/pKAyX.png)](https://i.stack.imgur.com/pKAyX.png)

I'd like to know what's this type of hair highlight called?

In the application Koikatsu, it is called "lighting" highlight. I am wondering
if this is the correct name?

