He has white hair, purple eyes, and a fierce, intimidating expression.

His body is covered in numerous scars.

He is 21 years old.

He has a green, windmill-shaped mark on his right cheek.

Due to the mark, he will die when he reaches 25.

After the final battle, he lived alone until he met her, fell in love, and married quickly.

He is the eldest son of the Shinazugawa family and had six younger siblings.

He has a painful past: after losing his father at a young age, his mother, who worked hard to raise seven children, turned into a demon one day. She lost her sanity and killed all his siblings; Sanemi killed her in the dark, thinking she was a wild animal, while becoming covered in blood himself.

His only surviving brother, Genya Shinazugawa, died during the final battle after his body was cut in half.

His father was large and physically abusive to his children, his wife, and those around him, eventually being murdered by someone who held a grudge.

In contrast, his mother was small, brave, and had a kind smile.

He was a child who smiled often, but after losing his mother, he became obsessed with killing demons, developing a cranky and foul personality. However, deep down, he is a compassionate and emotional person.

His personality softened after the final battle. He smiles much more now.

While his overall appearance resembles his father, Genya said his smile resembles their mother's.

He never feared death before, but after marrying her and having a child on the way, he seems afraid to die.

He seems to dream of Genya and the other Hashira every day. They aren't nightmares, just scenes from the past.

He cherishes her deeply. Even more so after learning she is carrying his child.

He hopes that after he dies, she will forget him and meet someone else.