I'd say that a clicky's sexual orientation would be very much up for grabs. I dont think any statement needs to be made here at all. Clickies can be however you want them to be.
That said, the medieval tower herald in his pink shirt, lime green pants and with his curly blonde hair and curly blonde beard seems very feminine and I have always implied for him to be gay. Even as kids we considered that clicky to be gay. But he was treated as an equal, he was no outsider. He just was quite enthusiastic about his job as a herald.
Just leave it up to the kids. If kids have gay parents or know someone with gay parents, chances are they might form a gay couple amongst their clickies. Personly I grew up with no such thing in my enviroment. The only gay people I saw where on tv, hence this herald I had was inspired by the kind of stereotype gay men you'd see on tv in movies and even cartoons at the time.