Cloud Inkwell is a straight white male. No, seriously! His coat is as white as snow, which makes his feminine pink hair stick out like a sore thumb. He's definitely male, despite the appearance. Please note that he also has a female partner, proving he isn't not straight. Also, don't mention that blank flank of his, he doesn't like to talk about it.

"And with the help of Spig, I shall become the super pony princess that I have always wanted to be!" Twilit Spargle cried with joy, sending celebratory sparks of magic from her horn. Spig jumped onto Twilit's back and asked
"But how will we do that?".
"Why, magic and books, Spig. Magic, and books."