One of the many different trophies and achievements found within (TOCS4) Trails Of Cold Steel IV is Empty Chest-er.
Empty Chest-er requires players to find and open a total of 358 Treasure Chests. These Treasure Chests can be missed and found literally all over the place, hence why they can be missable.
They can usually be found within dungeons, towns and on the world map too.
One such location that features Treasure Chests is Bryonia Island which features a total of 10 Treasure Chests all ripe for the taking.
1) Repair Stone, Rise Stone, Brave Stone, Resurrect Stone
2) Trial Chest (Rean and Juna)
3) Aerial Dust R
4) Trial Chest (Fie/Laura)
5) Freeze II
6) Teara Balm, EP Charge II, Celestial Balm
7) Blond Hair – Duvalie
8) Calvary Edge R
9) Trial Chest (Rean and Kurt)
10) Trial Chest (Jusis and Machias)