Hum, I couldn't help but notice that the bios of the various characters at the end of some chapters only explicitly mention One of the characters as being straight, while the lead who is out to her friends is listed as gay, seems the character bios are playing things close to their chest for the other three or so main characters.
I will say though, the author giving two of the most significant characters a VERY similar hairstyle was... certainly a choice. I would argue, a bad one.