Lance purposely kills 4 human criminals by exploding a grenade right in front of them.
One of the main characters (Lance) had a pretty hard childhood at his first years of the Galaluna Military Academy, he gets bullied by three other children and one of them seems to wanna harm really bad until they fight each other with the Manus robots.
The character Lance can become very furious if he sees one of his friends gets hurt badly, thus giving revenge.