Varian was a man of science. Always had been. Even with his (very much not scientifically impossible to explain) hairstripe, which not only wasn't a natural colour, but could (and of course absolutely would) change colour with his mood.
To be honest, Varian thought it was quite cool. At times. What was less cool, was the fact that everyone always knew what he was feeling at every time, which didn't really matter much, for the most part, but it was rather impractical for the times when he was trying to hide something.
Like that one time his dad asked him if he had made sure the raccoon had gotten out and couldn't come back in. Varian had very sincerely sworn to have done so, while the truth was, that he had already given the raccoon a place to sleep and a name, but the lie was believable and his dad would've probably believed him, if it wasn't for his stripe turning turquoise, which his dad had long ago learned was a great indicator of when Varian was lying.
While things did turn out okay in the end with that and Varian did end up being allowed to keep the raccoon (Ruddiger), it was still rather annoying to not be able to hide something as private as his feelings. On bad days, he'd tried to cut it off, but with no luck. It just grew back out and somehow it grew unimaginably fast. Cut the whole thing off? It's all back the next day.
Now, none of this is normal, Varian is aware, but it certainly wasn't magic either. That was a hill he'd die on. Magic wasn't a thing.
Especially, not magic hair.
But an encounter with Corona's princess might change his mind on that one.