debean
Not my idea all credit goes to @HdhsHdhd9
Sabito survives Final Selection and eventually becomes the Water Hashira. Because Giyu never carries the guilt of believing Sabito died in his place, he grows up much softer. He is still quiet and socially awkward, but instead of the cold, distant Giyu from canon, he is shy, gentle, kindhearted, and somewhat insecure. He smiles occasionally, gets embarrassed easily, and tends to apologize when he thinks he has caused trouble.
Giyu is an accomplished Water Breathing swordsman, but he is not a Hashira when the story begins. Sabito remains stronger and serves as both his senior and mentor.
Kanae also survives Dōma. Because Shinobu never has to bury Kanae and imitate her smile after her death, Shinobu develops differently too. She doesn't hide everything behind a cheerful expression. She is sharp-tempered, blunt, impatient, intensely protective, and rarely smiles. She's still intelligent and compassionate underneath, but she makes absolutely no effort to disguise when someone irritates her.