After completing the first enhancement and acquiring the martial arts of the Tenryuji Shingen School of kendo, Leonard Ethan rested for a few minutes and then turned his attention to another card.
[Sword Heart（SR）: As the most famous member of the Shinsen Group, Tsutsui became a disciple of Tenryuji when he was nine years old and wandered from Tama to Edo, where he met Kondo Isamu and entered his tutelage. In just three years, Tsutsui defeated the swordsmanship instructor of the White River Manor and became the top master of Tenryuji Shingen School at the age of twelve. He was only twenty years old when he became the Captain of the First Squad and the swordsmanship instructor of the Shinsen Group.
During his active years in the Shinsen Group, Tsutsui proved that his swordsmanship was among the top even among the numerous masters of the group. His gentle nature and innocent demeanor contrasted sharply with the bloodlust of many other Shinsen Group members.
