Nagamasa Azai

浅井長政

The ruler of Oumi province and Nobunaga's brother-in-law. In the past timeline, he betrayed Nobunaga, despite being married to his sister. Eventually, he was forced to commit suicide. [Spoiler] In the new timeline, Nobunaga managed to avoid his betrayal and Nagamasa became his trusted ally. Unfortunately, he was killed by Hisahide Matsunaga, who betrayed Nobunaga during a battle against Kenshin Uesugi [/Spoiler]