"What if anxiety was a blond British guy negging you?" Thanks, I feel so seen.
But seriously, it's quite ingenious to have anxiety as a yandere because the spiral is darkly seductive in a way. And that anxiety, when tamed, still has an important role to play in life, as in the Kalei ending where Geist is pushing the MC to eat better and exercise. It's necessary but can get out of control, so a hot egomaniac is perfect for that.