rengoku family react to him

No, Rengoku is not alive in the manga. He tragically died during a battle.

At first, Naruto would likely be very confused and hurt. He has always craved family love and acceptance, so this sudden turn would be a huge blow. He might try to plead with his family, asking them to believe him and give him a chance to explain.

Yes, Rengoku did die in the manga.

Yes, Rengoku does die in the manga.

His family would probably be overjoyed. After all, they might have thought they'd lost him forever. There would be hugs and tears, and a flood of questions about his life and what he's been through.

Rengoku doesn't turn into a demon in the manga. His character arc stays true to his heroic nature and doesn't involve any demonic changes.

They have some connections but not overly direct. Their storylines might intersect at certain points but not in a major way.

One idea could be a rengoku fanfic where he trains a new group of young slayers. It could focus on his unique teaching methods and how he instills his values in them.

Tanjiro would be a great character to pair with rengoku. Their different personalities could create an interesting interaction. Tanjiro's kind - hearted nature and rengoku's fiery determination could lead to some great storylines.

Rengoku remains deceased in the manga. His character's fate is set, and there's no resurrection. It adds depth and gravity to the narrative.