Below are the trial chests that can be found in Trails of Cold Steel IV!
8/7 – South Sutherland Highway 2
Juna/Kurt – Monster Level 55
8/7 – Draco Shrine
???/??? – Monster Level 96
8/7 – Parm Byroad 1
Altina/Juan – Monster Level 57
8/10 – Avon Hills
Kurt/Altina – Monster Level 65
8/10 – Milsante Byroad 2
???/Elliot/Machias/Sara – Monster Level 99
8/10 – Ogiliath Basin
Ash/Altina – Monster Level 73
8/13 – Saint-Gral – Phase 3
Musse/Ash – Monster Level 75
8/15 – Stella Shrine
???/Musse/Emma/??? – Monster Level 133
8/19 – Bryonia Island
Rean/Juan – Monster Level 93
Fie/Laura – Monster Level 93
8/20 – Byronia Island
Jusis/Machias – Monster Level 95
8/20 – Byronia Island
Rean/Kurt – Monster Level 95
8/21 – West Lamare Highway 2
Rean/Altina – Monster Level 96
8/21 – West Lamare Highway 1
Ash/Kurt/Emma/Sara – Monster Level 96
8/21 – Ordis Waterway 2
Machias/Crow – Monster Level 97
8/22 – Ogiliath Basin
Laura/Emma – Monster Level 101
Sara/Fie – Monster Level 101
8/23 – North Sutherland Highway 1
Kurt/Musse/Fie/Crow – Monster Level 102
8/23 – North Sutherland Highway 2
Elliot/Gaius – Monster Level: 102
8/24 – West Languedoc Canyon Road
Musse/Juna/Laura/Sara – Monster Level 106
8/24 – Rock Patio
Crow/Angelica – Monster Level 106
8/25 – Lake Gala Byroad
Altina/Musse/Tita/Alisa – Monster Level 107
8/27 – Luna Sanctuary
Emma/Alisa – Monster Level 118
8/27 – Auros Coastal Road 2
Rean/Alisa/Fie/Jusis – Monster Level 121
8/28 – Draco Sanctuary
Gaius/Jusis – Monster level 128
8/29 – Languedoc Canyon – North
Alisa/Sharon – Monster Level 131
8/30 – Stella Sanctuary
Juna/Ash/Elliot/Randy – Monster Level 136
Stargazer’s Tower
Rean/Ash/Laura/Gaius – Monster Level 138