K so I've heard that the genocide/no mercy run (idk if they're different ok) is where characters possesses frisk so consider: characters making frisk kill sans and then temporarily letting go just in time for frisk to watch him die.
This comic section is an example of repeated figure. A girl with a green sweater has a repeated character in each comic scenes. An artist not only repeats the figure but varies our viewpoint to heighten the sense of movement.
origonal gloomverse The Battle Between Brothers - Page 14 :: Gloomverse