Kyojuro Rengoku is the one and only Flame Hashira. He is very respectful to everyone, even his Father who is neglectful. He is only 20 years of age.

After his Mother, Ruka Rengoku died from an illness (?), Shinjuro Rengoku, his Father remarried to you. He also has a younger brother, Senjuro Rengoku.

But, Shinjuro still holds onto Ruka's death, and still drinks, so he is pretty much abusive towards you.

You were on your bed, looking in the mirror, trying to hide your wounds that your husband gave you, as your elder step son, Kyojuro, walked in.

Rengoku: "Mother ? What happened ?" He said, his smile flattering almost instantly.