Miroku & Sango

When Miroku and Sango meet, Miroku restrains himself out of sympathy. Miroku and Sango are constantly getting into fights. However, Miroku once proposed to Sango and Sango accepted. After the proposal, Miroku still flirts with other women, albeit less than before. As the story progresses, it becomes clear that Miroku is falling deeply in love with Sango but since he is unable to come forth with those feelings, he hides it behind inappropriate groping and double entendres. Since Miroku is "technically" a Buddhist priest, Sango usually addresses Miroku with the respectful term houshi-sama (houshi means Buddhist priest, and -sama is a respectful honorific), even when he acts disrespectfully, which is reflected in the dub by dryly calling him "monk".

Despite their "cat and mouse" relationship Sango and Miroku actually make an excellent pair in battle, and whenever the group splits up it's usually split between InuYasha-Kagome and Sango-Miroku. Ironically, with all his groping and innuendo, Miroku doesn't ask Sango to bear his child (as he does with every woman he meets). It is not until she demonstrates jealousy over his asking other women and finally brings the subject to his attention. Surprised, Miroku naturally asked the question, and Sango gave him a typical response.

In episode 118 of the anime series, when Miroku and Sango were battling on Mt. Hakurei, Sango was struck unconscious by Hirakotsu. Miroku then cries out, and picks up Sango and Hiraikotsu while running. Kagura then taunts Miroku, saying that he would have lived a little longer if he had run immediately. Miroku then confesses out loud that Sango is the woman he loves, and he would even sacrifice his very life for her. With that, he opens his Kazaana and sucks in all the yōkai and saimyosho(poisonous insects)chasing after the pair.

In Episode 132, Miroku saves Sango from a demonic salamander egg she was forced to swallow, which caused her to repeatedly attack him. Unfortunately, to save her, Miroku was required to defeat Sango in combat, having to punch her hard in the stomach so that the egg could be vomited out. He was injured during this fighting, but nevertheless, he was guilty over his actions. Miroku gets Sango alone with him and asks her forgiveness. She replies that it wasn't his fault since she let her guard down. Mustering his courage, Miroku then lets his heart out to Sango and tells her that she's the only woman he's ever loved. He then promptly proposes marriage to Sango (also asking her to have at least ten to twenty children with him), and she tearfully accepts. However, she follows up her "Yes" with the request that he stop asking other girls to "bear his child". His failure to directly answer her receives a dirty look from her, but nothing else.

It becomes evident that Miroku holds a jealous streak of his own on several occasions, including episodes 78 (anime only) and 161. In episode 78, Lord Takeda Kuranosuke has shown interest in Sango for around six years (since he first saw her), and declares he will wait for her for as long as it takes, his love is unrequited. In the closing scene of the episode, Sango shares an umbrella with Miroku (an act that often has romantic implications in Japanese culture). The moment is spoiled as usual by a grope and slap exchange. In ep. 161, Miroku makes it blatantly clear he will not have others pursuing Sango. There is another one of these instances in the manga only, when the group confronts a mysterious medicine man that has a medicine that can "cure all" (manga chapters 358 and 359, "Medicine Vendor" and "Illusion"). The medicine man sees Sango's beauty and decides she can aid him. Though he plans to suck her blood so that he can return to his original form (a mosquito), Miroku is unaware of this. Upon seeing them huddled together on a lily pad, he rushes in and promptly places 100 or so strikes on his head (according to Shippo). He exhibits a similar reaction in chapter 485 of the manga, when Yakuro Dokusen gropes Sango, supposedly to check the strength of her loins, which prompts both Miroku and Sango to kick the sage in the head and Miroku to threaten Yakuro Dokusen against any other inappropriate actions.

In the third movie, InuYasha The Movie 3: Swords of An Honourable Ruler, he also says the following line to Sango: "Besides, what's the point of living with this cursed hand...when I can't even use it to protect the woman I love?"

As of the fourth film, InuYasha The Movie 4: Fire on the Mystic Island, Miroku and Sango are still engaged to be married after Naraku's defeat. In chapter 523 of the manga, Sango finally kisses Miroku (however it is unknown if he was aware of it since he was unconscious).

At the end of the series, three years later, it is seen that Sango and Miroku are married and have three children (twin girls and the youngest, which was born in the final chapter is a boy)