Inventory of the "unusual stuff":

69 × U+FE0E (VARIATION SELECTOR-15) — invisible. Two lead the text (offsets 0x00–0x05, before "White"), 67 fill the body. Note: copying from the rendered tweet tends to strip the two leading ones.

125 × 0a newlines — the vertical blank-space padding.

One 0x20 space at 0xa6, wedged between two selectors where every other gap is newlines. It's the single most out-of-place byte in the invisible block.