The trick of "That Girl in the Corner" is that it spends four stanzas pointing at someone else. "See that girl in the corner, / Reading by herself?" sounds like a narrator drawing us aside to gossip or to pity. We get the familiar picture of the loner, absorbed in a book, a worksheet, a doodle in the dirt. Then the speaker corrects it, and the correction is the real subject. The girl isn't absorbed at all. She "looks focussed on the story, / But she watches everyone else." What passes for solitude is a kind of close attention to other people.
The poem builds this idea with a repeated machine. Each of the first three stanzas opens with the same question, gives two lines of appearance, then pivots on "But." The pivots also escalate. First she "watches everyone else," then "her mind is on you all," then "she sees you all, you know." With the second stanza the bystanders become a "you," and by the third the phrase "you know" can be read as chatty or as faintly accusing, as if the audience already knows and has chosen to do nothing.
The props in these stanzas work as disguises. The book, the paper and the patterns drawn in the dirt are all things to be busy with, ways of looking occupied so that nobody can say she is alone. The best image is "Eating with her shadow." It is funny for a second, then sad. The only company at lunch is something that cannot speak and cannot leave. The settings also drift outward: a corner, a table, the grass, and finally "over there," the vaguest place of all, as though she is being pushed out of the map.
Stanza four drops the "But" structure, and the defensive pattern falls away with it. For the first time she wants something: "someone to look past her flaws, / To be there in the end." The phrase "look past" suggests she assumes people notice her flaws first. What she asks for is modest. She wants one friend who stays, not a crowd or popularity, and the word "end" suggests loyalty over time.
The form keeps all this quiet. The lines are short, with roughly three or four strong beats, and they read like speech rather than performance. The rhyme is loose and falls only on the second and fourth lines: "herself" with "else," "shadow" with "know," "friend" with "end." Stanza two slips, with "alone" and "you all" offering only an echo, as if the poem refuses to polish itself. That looseness makes the last rhyme land harder. "See" and "me" close the poem, and "see" has been the opening word of every stanza. Being seen and being herself turn out to be the same issue.
The ending reverses the poem. "Oh, and one more thing" has the tone of someone turning back at the door, and the casualness hides the weight of what follows. "That girl that you didn't see, / She knows you really saw her" looks like a contradiction until you read it as an accusation. The onlookers did see her, and what they failed to do was acknowledge her. The failure is not blindness but looking away. Then "that poor girl was me" shows that the whole poem has been a self-portrait told in the third person. Calling herself "poor" may borrow the pity others have for her, or it may be bitter irony. Speaking of herself at a distance also protects her until the final word.
The poem is significant because it moves the reader. We begin as the people being addressed, comfortably looking at "that girl," and we end as the ones who have been caught looking. Nothing is supplied about when or why it was written, so the poem has to stand on its own, and it does. Its plain words and repeated question make loneliness something active and watchful. It also asks for more than a glance, because the girl in the corner has seen every one of us.