wait, Scanty? Isn't this Kneesocks? She even has glasses and straight hair rather than wavy and the hairstyle looks similar to Kneesocks.

not to mention, she isn't as plentiful as Scanty

unfortunately the source isn't tagged for us to see the artist commentary. Either Kikimaru is certain it's scanty from the source, or it's a mistake.

"No horn" leads me to believe it's Scanty; though if someone translates the notes, that would help.

It's obviously Kneesocks, this is exactly what costume she used in the second to last episode.