If their face (or lack of one) doesn't allow for expressions or talking, they need something to let us know that they're the one talking, and that's an LED that responds to their voices
[MUST READ]: Look, I know I said "no TV heads" even though I mentioned Titan TV Man but the reason I included him is because his head isn't the only TV on his body. Just want to make sure I don't l sound like a hypocrite
It's very common to see a character with a TV for a head and I get it; TVs can display all kind sorts of imagery which allows for unique facial expressions. But what if the TV was placed somewhere else on the body?