After Ann joins, your next goal is to secure a route to the Treasure. This involves navigating through the East Building and the Training Hall. You'll encounter more challenging Shadows, so ensure your Personas are well-rounded. Fuse new Personas in the Velvet Room to cover more elemental weaknesses. Look out for the 'Will Seeds' – three hidden collectibles in each Palace that grant powerful accessories. The final section of the Palace involves a puzzle to open the path to the Treasure. Once the route is secured, you'll send the calling card. Remember, once the calling card is sent, you have one day to defeat the boss. Use the remaining days to prepare, level up, and stock up on items.
