Type a Bluesky handle. We hash every one of that handle's mutuals' avatar photos — a 64-bit difference-hash per pfp, the same trick reverse image search uses to spot near-duplicates, skipping solid-color and stock icon-on-color pfps since those match everyone for no real reason — then pair up whoever came out closest. Each pair gets a rhyming mnemonic built from whichever one of them actually has something to say: a line pulled from their bio or recent posts that the other person never wrote or posted, rephrased as a fact about them, falling back to pfp color, brightness, or which corner is lit when neither has distinctive text to draw from. Mutuals whose display names alone are easy to confuse get flagged separately, pfp aside.