There’s an interesting clue to the narrator and their state of mind when you check the bag of dog food in the lab.

You see, unlike the dummy and tree, it’s affected by kill count, not LOVE.

If you kill no one…

The narrator becomes optimistic. They don’t want you to kill. The bag is “half-full”.

If you kill even one person (even a tiny whimsun, who won’t increase your love to even two)

…the narrator becomes pessimistic. The bag is now “half empty”. Their state of mind is directly changed by you killing even one person.

But if you kill Doggo, and your kill count is 21+….

The dog bag becomes funny. This is directly affected by killing Doggo and killing more than 20 people. The narrator doesn’t find his death funny before 20 kills. Something has changed in them.

Now, why is that? What kind of narrator becomes affected by you killing things, to the point where they become pessimistic if you even kill once? What kind of narrator becomes sadistic if you kill so many people?

One that is with you. One that shares your EXP and LOVE.  One who becomes distanced as you distance yourself, and violent as you become violent yourself.

One who is looking to you for guidance.

One who only ever refers to themselves as Chara. One who only ever refers to “you” as Frisk.

Chara is the narrator, and their view on the world is directly changed by how much you kill.

• If you kill no one, they’re optimistic. They don’t want you to kill.
  
• If you kill even once, they become pessimistic.
• If you kill over 20 people then they can be sadistic, even on a non-genocide route.
  

But they do not find Doggo’s death funny unless you kill more than 20 people (which is more than the equivalent of an entire area’s worth of monsters). They did not find it funny before the kills corrupted them, or they would always find his death funny, even without the kills.

Chara’s Level of Violence and Execution Points start at 1 and 0.