I just realized the only people she's able to scare are all bird youkai.

Yes, you can get circle patterned things like in the last panel which apparently will frighten off birds... supposedly because they register as a predator eye. I can't say how well they work, but that would be what's happening here.

Kernel said:

Yes, you can get circle patterned things like in the last panel which apparently will frighten off birds... supposedly because they register as a predator eye. I can't say how well they work, but that would be what's happening here.

The addition of an actual eye on said circle probably helped.

i'm pretty sure if she used it on utsuho, she'll be nuked.

medicman101 said:

i'm pretty sure if she used it on utsuho, she'll be nuked.

Utsuho may be a bird, but she's also a predator that ate a bird god