Just so, why did Mikoto SUOH die?
Character Analysis Suoh Mikoto. He were killed by the colorless king and as Mikoto kill him, he was killed by Munakata Reisi because if he didn't do this a huge area would be destroyed and a lot of people would be dead.
Similarly, is Mikoto dead? Mikoto thanks him, impaling Yashiro in the chest and seemingly killing both the Colorless King and Yashiro. Mikoto's Weismann levels sky rocket, and he tells Reisi to kill him. There, Reisi stabs him in the chest with his saber, and, after apologising to Anna, Mikoto dies.
Keeping this in view, what Mikoto said to Munakata?
In the light novels, Mikoto states that he wants to release all his power and be free, and that is what Munakata calls reckless use of power.
Who killed Tatara Totsuka?
? ???, Totsuka Tatara) was one of the first members of the Red Clan, HOMRA. He was a pacifist and was considered to be the weakest of all of his Clansmen. One night, he was shot and killed by the Colorless King, which eventually resulted in HOMRA's manhunt for his murderer.