Giyu Tomioka
Physical strength
Giyu's physical strength is superhuman, as demonstrated by his ability to swing his blade with enough force to create a gust of wind that knocked Tanjiro and Nezuko back. He also effortlessly held down a berserk Nezuko with one hand.
Survivor's guilt
Giyu feels survivor's guilt because his sister and friend sacrificed their lives to protect him, and he doesn't think he deserves to be a Pillar.
Nichirin Sword
Giyu can turn his Nichirin Sword bright red with the help of Sanemi, which requires a lot of grip strength.
Durability
In his battle with Akaza, Giyu was able to cut through Akaza's body and limbs multiple times, despite Akaza's high durability.
Ropes
In his spin-off story, Giyu was able to easily break strong ropes tied around his wrists