It's pretty weird.
The character sprites are being called in the plugins by the Kurage_SimpleTachi plugin. (Because why use the build in system if you can use an obscure plugin instead.)
In that Sunshine is listed as Character08.
The plugin automatically shows a sprite whenever a character with a listed name speaks.
The only file with that name is the sprite you see there, that's why I used it. Same with Gangdead Executive at slot 07.
I currently have no idea why it doesn't show up in the original even though it is connected the same way just in Japanese.