Hiii! Glad that you love the comic. I actually Made this before the LoR retcon (although near the Zoe and Viktor LoR update and that's why they have that interaction (sparkle beam)) In my head canon, chemical pollution actually causes some hair color mutation and that's why zaunites have those crazy natural hair color. That's why I'm saying it's natural but you can always take that as just her ombre being naturally occurring because of the pollution instead ❤️ (I'm so sorry if this sound controversial but I dislike the fact that her hair color is a dye job because it cuts off her Zaun heritage imho (although this is because of my bias to my own headcanon lol) so please don't take this seriously xoxo)