Hayate the Combat Butler/Ho Yay

"Hinagiku: Now I'll never be a bride... Ayumu: I'll take you. Hinagiku: What about Hayate? Ayumu: That's right... Then how about Polygamy?"
 * In the manga, one butler falls in love with Hayate, who at the moment is under a crossdressing curse. Although initially devastated when he finds out Hayate is actually a guy, he quickly comes around and tries to convince Hayate to travel with him to the Netherlands, where same-sex marriages are legal. (Cue Nagi's Megaton Kick.)
 * In the manga, Nishizawa comments that she can't help but be a little turned on by Hinagiku. It is also later hinted in the manga that Miki has a crush on Hinagiku.
 * Much later, it's implied that Hinagiku crushed on Athena when they met for the first time. Their encounter is more than a bit reminiscent of other yuri-styled meetings...
 * Also, Ayumu and Hinagiku. And Superintendent Kirika and Sion.


 * Chapter 304 reveals that Kotetsu has become a Stalker with a Crush to Hayate when he follows Hayate into the public bath and directly states this as the reason why he is there and states that he loves Hayate. Hayate responds by trying to drown him. Kotetsu Segawa is canonically gay for Hayate, and Azumamiya is almost undoubtedly attracted to him after the Mt. Takao trip (when Nishizawa met him she could literally sense it and moved to grab Hayate right after he introduced himself).
 * The weird part is how Hayate acts around Kotetsu. No other character can get Hayate to show his dark side...which pretty much consists of being a Tsundere. Seriously, whenever they're together Hayate basically acts like a stereotypical tsundere love interest, albeit a particularly violent one with Ranma-esque strength and skill, and has twice managed not to kill him to have a dere moment...which Kotetsu inevitably ruins instantly and gets beaten down HARD.
 * On that note, Father Radiostar has had a few moments as well and did canonically write Hayate a love letter. That creepy, stalker-ish love letter. Tama sort of has his moments but depending on his mood it may be more like Foe Yay.
 * We also can't forget the yuri-tastic friendship between Hinagiku and Athena, where Hina pretty much admired Athena on sight and blushed nervously as she tried to ask for her email address. It was explicitly stated that Athena didn't interact with anyone else like that and that the two were an unstoppable duo that basically ruled the school together.
 * From way back when Hayate went to the Kendo Club to get Nagi interested in sports (because Hinagiku mentioned Nagi tried to join before), we see that Nagi and Hinagiku had an almost identical start with Nagi admiring how cool Hinagiku was and playing out much the same as the above relationship - at least until Nagi realized she would never be like Hina
 * And with the Greece Arc we also have much more Nagi/Ayumu moments with the two being seemingly inseparable friends at times, it even extends after and the two seem quite friendly even after returning to Japan. Also Ayumu told Nagi she loved her during her birthday story. It was very heartfelt.
 * Does Luca and Hayate fit here? I mean she thinks that Hayate or "Maid Star" is a girl, and she did kiss "her" on the cheek thinking that and seemed to be generally enamored of "her". Seems like it's going to fit here until she figures it out.
 * Nagi and Isumi. Nagi outright asked Isumi to marry her when they first met and Isumi actually understood her manga, and Isumi says (regarding Hayate), "But I can see why my Nagi put her trust in him".