Brie's poem is about a girl who goes unnoticed. She is labeled "X," a name that suggests she is a blank or an unknown, someone people don't bother to figure out. The speaker explains that she looks ordinary, "not special" on the outside, so most people never get past that first impression.
But the poem's real focus is what they miss. Inside, she is "a glaxay of stories" (a galaxy, presumably), with "a mind full of love" and a heart full of "beautiful blemishes." That last phrase is the most interesting one, because it treats her flaws as part of her beauty rather than something to hide.
The speaker sounds tender but a little sad. The repeated lines "but no one will ever know that" and "you will never know that" create a quiet ache, as if the speaker sees her clearly while the world doesn't. The mood is gentle, wistful, and protective, with a hint of frustration at how easily people judge by appearances.