Tanjiro: *Will notice your advances but when it comes to confessing, he'll remember the time he told his siblings he wanted to marry someone loyal like a dog and get embarrassed, so you're gonna have to make the first move*

Inosuke: *Won't understand any of your approaches, he'll just wonder why you're acting so weird. You'll have to say you love him, straight up, then explain what love means. It'll be tough, but you can do it*

Zenitsu: *I think we all already know*

Nezuko: *Just pet her a bunch*

Kanao: *She won't understand your approaches either, but will probably get flustered when she wants to confess, so you'll have to take the initiative*

Giyuu: *Expect your life to be hard, because he can't carry any of the conversations, read the atmosphere, and doesn't know how to act around you. You'll have to confess first*

Shinobu: *She'll probably tease you, even though she knows you like her and she likes you. So, it might be a little painful, but when you finally confess, she'll probably try to "ara ara", but that's just her way of trying to relax. She'll be nervous, regardless, but hide it well.

Tengen: *Uh... he's got three wives y'know. He may be okay with letting you become his fourth, but if your a guy, I don't think you got much of a chance. Sorry!*

Rengoku-san: *Just be really energetic. And you may want to confess to him with a flourish and a fiery kiss at the end. (hehe)*

Iguro: *Yeah no, you got no chance.*

Mitsuri: *You can confess, but you gotta be stronger than a pillar, and Iguro because he's gonna wanna kill you, so it may take a lot of training that could potentially kill you. As for confessing, be straightforward. If she likes you, she'll beam and tackle you into an enthusiastic hug*

Gyomei-san: *Be very calm, resilient and expect moments of deep silence from him frequently. It could be tough*

Muichiro: *You're gonna need to confess several times for him to notice you. You might be rejected though, because I'm pretty sure he's gay for Tanjiro*

Sanemi: *If he actually likes you, he's probably gonna pin you to the wall and kiss you very, very aggressively. He'll be faithful to you and always protect you though, so he's a cool guy to be lovers with*