I wanted to draw Lisa so I went to look at her character design, and I noticed the way Lisa's hair is shaded is different from other characters in every official images (game, Garupa Pico, manga,...). I think she balayage highlighted her hair.

I found no official information about her hair why would it exist anyway, I'm so stupid so I want to ask if anyone knows any official info to confirm this or has thought of the same thing as me. I saw a lot of fanart where the artists shade her hair without highlight so I want to make sure I draw her accurately.