If the story doesn't utilize gay characterization, then they're not gay characters. They just happen to be gay.
Like, oh, a character can speak 5 different languages but it's never relevant to the plot.
A character is/was top of their class - but we never see their class.
Character is a "genius" - doesn't invent or solve problems.
Character is "funny" - never cracks a joke.
Shiro had a boyfriend. So what? They did the same thing with Green Lantern. Boyfriend blows up on a plane. They never speak of it again. >Queerbait