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Overall, I failed to depict the intended character again, but that's okay, because there aren't five people in one school.

Notes:
a) The face and figure turned out a little better (although there are some doubts about the lower part).
b) I made several mistakes with the hair right away (forehead line, ears, etc.), and overall, it didn't turn out as I wanted. In addition, I made this even worse by choosing a very unsuccessful color.
c) Following Koshi's advice, I tried using orange and pink as skin tones. I doubt I did it correctly, and my feelings about the result are mixed: it looks questionable, but at least it no longer blends with the background, and the eyes stand out more. Regarding the eyes – they are definitely better now than in all previous attempts, although the unevenness doesn't save them.
d) I noticed that when drawing eyes, eyebrows, or the collarbone, my curved lines tend to have the same slope, even though they should be opposite. I don't know what's wrong. Maybe I need to rotate the paper more.