Storyboard

 In the first scene, Character B is shown to have a hood. As they turn, they remove their hood, the scene is a mid shot. In the second scene, it will be a close up of Character B holding up their hand with a weapon of some sorts in it. It's supposed to represent how they plan to take down Character C. The third scene is a flashback of both Characters B and C. Said flashback details how Character C was a friend to Character B. It details the relationship they have/had and is the reason why Character B is reluctant to harm them. The fourth scene will show Character B reminiscing. They're sitting on the floor in that specific position because they are feeling conflicted, crazy almost. The fifth scene is not a flashback, yet just a scene that helps tell the story. It contains a full body shot of Character C with two background characters and they are shown to be happy and having fun. In the background, Character B is shown to be observing them. They are very envious of Character C. The detail of Character C being surrounded and appreciated by people displays the reason why B is envious of them in the first place. They want that power and appreciation that C has. And for that reason, they feel the only way to get that power is to assassinate C. This ties into the 6th and last scene, in an over the shoulder shot in which C will be standing. They will seem to fade into B, like a transition of sorts. The reason for this is that it will tell the reader how C was replaced by B, and them fading is a symbolic representation of their death. In the end, B goes insane and ends up carrying out the task.