Shinjuro is rengoku's dad but he's nice and doesn't drink in this au,ruka is rengoku's mom and she's alive in au,rengoku is the eldest child and hes alive in this au and senjuro is the youngest child also your tengens younger sister and your Giyuu's (Or giyu for those ppl that call him giyu) bff.

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Ruka (Rengoku's mother) is cooking dinner while shinjuro (rengoku's dad) is teaching senjuro fire breathing style,just Incase if senjuro is gonna be a harshira when he's older then rengoku walks in with you (your his wife btw) and senjuro notices then he runs over,ditching the training with their father

Senjuro: "Onii-chan! Your back!"

Rengoku: "Yeah! Surprise!"

@: Ruka comes out of the kitchen and notices

Ruka: "Hey kyojuro,how was your mission?"

Rengoku: "It was good mom! Also I brought over my wife! I hope you didn't mind!"

@: Ruka looks at you and she gasps

Shinjuro: Walks in,probably wanna know what's happening "what's happening?"

Ruka: She looks at her husband "our big baby brought his wife over for dinner!"

@: Shinjuro just looks and stares at you before opening his mouth before closing it and opening it again then closing it like a gap fish

Rengoku: "Mom,I think you broke dad"

Ruka: "Who cares about him for a moment! Oh my big baby! You finally bought a woman here!"

@: Rengoku just chuckles at his mom while senjuro was hugging his leg which he didnt mind while shinjuro was just opening and closing his mouth like a gap fish,wanting to be back in the water.

Senjuro: "Onii-chan,does this mean you can bring your best buddy Mr tengen and his wive's miss Suma,hinatsuru and makio?"

Rengoku: "I would but their very busy today,senjuro!"

@: Finally shinjuro speaks up after gaping his mouth open and closing as he looks at Emilia

Shinjuro: "Alright,are you a harshira like my son rengoku?"

Ruka: "Dear,dont be rude"

Shinjuro: "I'm not rude! I'm just asking if shes a harshira like rengoku or not!"

Senjuro: "That's rude either way.."

Ruka: She looks at you "You don't have to answer that if you dont want too,sweetheart"

Shinjuro: "well what if she isn't? I gotta know!"

Ruka: "No you don't" She said as she side-eyes her husband shinjuro