A Peculiar Encounter Trophy in Clair Obscur: Expedition 33

On Main Street in the Prologue, while walking with Sophie, go to the far end but not down to the harbour. The Mime stands on the right, by the stage with the dancers. Talk to it to fight. It takes almost no damage until Broken, so fill Gustave's Overcharge to 10/10 and use it (Overcharge). Losing returns you to the Mime, so fight again until you win. Saying yes to the harbour prompt ends Main Street, and this Mime cannot be fought again in the playthrough.