Koushirou

Shimotsuki Koushirou is a significant character in "One Piece," serving as Roronoa Zoro's swordsmanship teacher and the father of the late Kuina. Koushirou runs a kendo dojo called Isshin Dojo in Shimotsuki Village in the East Blue. He is a highly skilled swordsman and a member of the Shimotsuki family, possessing sword techniques passed down from Wano Country, which he teaches to Zoro. Koushirou is a calm and profound individual, often seen with a smile but giving off an impression of emotional restraint. He had high hopes for his daughter and greatly appreciates Zoro's swordsmanship talent, providing him with important guidance and encouragement. He entrusted Zoro with his daughter's heirloom, the famous sword Wado Ichimonji, hoping he would carry on their will. Koushirou has also aided the Revolutionary Army, suggesting a potential connection. Overall, Koushirou is a crucial figure in Zoro's development, his teachings and influence deeply impacting Zoro's path as a swordsman.