[They're true punks to their cores, no matter the topic. At least they aren't pulling a Mean Girls yet.]

You're fine, Mei! There's no way I'm gonna make you change your color! It's great the way it is.

[Plus, it helps them look related, so Kouha will dig his heels in whenever the concept of either of them dying it comes up.]

What, is Haruji's hair weird? What color is it?

[He's heard of the mysterious Haru, but he hasn't gotten to meet him in person. Now, his curiosity is really piqued.]