Is black butler gay

Much to my aggravation as a bisexual person, the Black Butler fandom acts like almost all of the characters are somehow gay men even though we see them having sex with women or engaged to women. Since I've never read the manga, I'm asking you guys which characters might actually be LGBTQ. I think the *only* one is Grell, who is I think is bisexual.

Both the manga and anime aren’t classified as BL series, so officially, it’s inaccurate to put Black Butler in the BL genre. Despite this, the series’ style and trappings no doubt appeal to.