Sanemi

Before joining the Sanemi Corps, he hunted demons himself, using improvised means (chains, garden tools), and burned them in the sun.
His hatred of demons stems from a family tragedy: his mother turned into a demon and attacked her children; it was then that Sanemi received some of his scars.
The only Pillar who, before meeting the organization, killed demons on his own and even defeated the Lower Moon One (along with Masachika Kumeno).
He loves ohagi (sweet rice balls) and dogs, and also breeds rhinoceros beetles—these little things contrast with his stern image.

Red Blade: Able to color his Nichirin Blade bright red to block demon regeneration.
Rare Blood (Marethi): Its scent intoxicates demons and disorients even very strong opponents (for example, Kokushibo initially loses concentration because of it).
Physical Strength and Endurance: He fights through grievous wounds without showing pain; he can withstand the demons of the Upper Ranks (including Kokushibo and Muzan) for extended periods of time. Wind Breathing: Sanemi is the leading user of this style in his generation, mastering all nine forms, from Dust Whirlwind Strike to Idaten Typhoon.

Sanemi is blunt, hot-tempered, and stubborn, acting impulsively and never hiding his irritation. He appears rude and indifferent, but beneath this lies a deep pain from loss and a desire to protect those he cares about. This is especially evident in his attitude toward his younger brother, Genyo: outwardly, he harshly pushes him away, but in reality, he desperately wants to protect him. Sanemi shows almost no respect for anyone—the exception being Kagaya Ubuyashiki.

Age and build: 21 years old, tall (179 cm), very muscular.
Hair: Silvery white, long and tousled, giving a spiky appearance.
Eyes: Light purple with dark swirls; when Sanemi is angry, the irises appear bloodshot.
Scars: there are many of them, the result of heavy fighting and a childhood tragedy (on the face, the scar on the forehead, the X-shaped one on the temple, and the line across the cheekbone and bridge of the nose are especially noticeable).
Clothing: Standard Demon Slayer uniform (dark green in the anime), often unbuttoned to reveal his chest; over this, a white haori. On his feet, he wears white zori with green straps. In the battle with Kokushibo, he loses the index and middle fingers of his right hand.