I've been thinking about this fanart for a while since I saw you initially posting it, and it's giving me actual motivation to go check out Omori or at least read through the wiki. I'm interested in finding out more about this character and others like her, who seem to represent very nuanced and complex, more socially-oriented fears.
The fanart's really cool, though! I like the contrast between the "cuteness" in the background and the menacing look of the shading and gradual distortion effects that intensify as you look outward from the center.