Yorichii tsugikuni

Personality Yoriichi was a calm and respectful person, with a solemn and reserved expression at all times, rarely showing outbursts of emotion. In general, Yoriichi had a low, collected disposition to match, evident when he was slaying demons without changing his expression or when Muzan was caught off guard by his immense skill because he appeared modest. He was also extremely humble, seeing himself as just any other man and no one special despite his godly attributes; an example was the time he performed the Sun Breathing poses for Suyako at her request and almost looked embarrassed afterwards. Despite being mostly indifferent, he experiences strong emotions; she mourned the loss of Uta and her unborn child for ten days straight and burst into tears seeing the joy Sumire displayed at simply being lifted up. He also smiled warmly and expressed his gratitude to Sumiyoshi after his friend told him that his life was not useless and vowed to preserve his Sun Breathing techniques through his descendants. Yoriichi is also very kind, shown when he was on his way to find a midwife in preparation for his son's birth, he accompanied an old man he met on the way to see his deceased son.

Past His brother also noted that Yoriichi always had faith in the future and was confident that despite the overwhelming power possessed by the Demon Slayers who used Breath of the Sun, a generation would arise that would even surpass his own. As a child, Yoriichi was shown to worship and idolize his older brother Michikatsu, even stating that he will support his brother's dream of becoming the strongest Samurai in their country, and that he would become the second strongest; In his childhood, he was also extremely reserved and quiet, even being considered mute by his family for seven years, as he never spoke. When he met his older brother again after sixty years, and seeing the latter embrace his new life as a demon, he was deeply devastated and pitied his brother for what he had become, attempting to kill Michikatsu himself to stop him, later showing that even though his brother became a demon and abandoned and betrayed the Demon Slayer Corps, Yoriichi still treasured Michikatsu's handmade flute, which showed he still loves She went and treasured her memories with him.