Murasame

History
Murasame is a sword that Akame, a Night Raid member, uses. It is a poisonous blade that can kill a person with only one cut. Once the sword pierces skin, it injects a lethal poison into the victim, killing them within seconds. However its ability only works on organic things that have a heart, thus it's ineffective against Armor and Biological Type Teigu, as well as machines.

Cleaning this weapon is very dangerous, as the slightest cut can kill the user.