Chained Echoes

The soonest you can get this one is at the beginning of Act II when you have both Sky Armors as well as the airship.

1. Cleric Class Emblem (Narslene Sewers, VERY HARD TO MISS)
2. Warrior Class Emblem (Rohland Fields)
3. Vampire Class Emblem (Research Camp, Fiorwoods)
4. Shaman Class Emblem (Flower Fields of Perpetua, west)
5. Monk Class Emblem (Rooftop of the Kindreld Monastery)
6. Bandit Class Emblem (Kortara Mountain Range, outside of Rockbottom) or Summoner Class Emblem (Arkant Archipelago, bottom left area)

Full List of Statues locations.

To get the emblems from the statues throughout the game, you also need sacred water. These emblems can be equipped to gain a very nice buff.
EMBLEM LOCATION
Cleric Class Emblem: Location: Narslene Sewersk. You find this first Class Emblem as part of the main story quest, so it's hard to miss. It is located in the sewers in Farnsport, just before you exit them.
Monk Class Emblem: Location: Top floor of the Kindreld Monastery.The story will take you to the Kindreld Monastery after you've been to Tormund and through the Flower Fields of Perpetua. You will reach the Monastery after passing through the Leviathan's Trench, so you can't miss this area.
Warrior Class Emblem: Location: Rohland Fields. This Class Statue is found between Basil and the Seaside Village in the Rohland Fields. From Basil's teleport crystal, head south into the trees and then east along a path until you move to the next screen. Follow this around, and it will take you to a ladder.
Vampire Class Emblem: Location: Research Camp, Fiorwoods. From Iden's Teleport Crystal, head north and follow the path until you reach the next screen on the left. Cross the bridge and head down when you get to a clearing with three Vin boar enemies. You will need to just walk into the forest (where normally you cannot) to get to secret paths until you reach the camp.
Bandit Class Emblem: Location: Kortara Mountain Range, outside of Rockbottom. Teleport to Rockbottom and travel through the building in front of the teleport stone. Head to the higher level and make your way out of the building onto the rooftops, and keep heading to the right. After going up a bit, look for green trees on your left and go through there. It is in crab village.
Shaman Class Emblem: Location: Flower Fields of Perpetua, west. From the first Teleport Crystal in the Flower Fields of Perpetua, head left and run across the sizeable purple coral patches in the water. Follow this all the way around and down until you come to land.
Summoner Class Emblem: location: Arkant Archipelago. First you need to disable 3 anti-air canons so your Armour can fly at higher altitude. The statue is on the island on the southwest of the map.
class Emblem: location: Shambala. After you disable the 2 anti air cannons, you can use your armor to fly to the southwest of the map for a floating island.


SACRED WATER
- You get one automatically from Sienna’s prologue quest when she stole this item from inside a house.
- Chest: In Tormund, go to the pub’s basement and enter the second bedroom. The chest is in front of the bed’s footboard.
- Chest: In Leviathan’s Trench, look for the abandoned chest at the dead end on the right flank of the map.
- Chest: In the Hooge, move to the top of the map where there’s a moving platform. Use it to cross to the other side and jump off the roofs until reaching a chest on the right.
- Chest: In New Wyrnshire, enter the castle and look behind the Queen’s throne.
- Chest: In Flower Fields of Perpetua, fly past the black Tak the Yak and land in the valley hiding the fifth flask.
- Chest: In West Ograne Grottos, kill the Tadey to the right of the Magic Warrior statue and pull the chest open to get the last Sacred Water.

The other five flasks are from Reward Chain. Press “LT or RT” on your controller to see the reward board. Chain Rewards are earned whenever players finish tasks that are adjacent to one another. When, for example, 4 of the tasks chained together, you can open another tab in this section to claim the reward (which is Rewards chain #4 in this case). The next chains are #16, #32, #48, and #72.
Note that you only need six sacred water for the six statues.

Credit to thegamer.com and gamerant.com.
https://www.thegamer.com/chained-echoes-classes-unlock-compl...
https://gamerant.com/chained-echoes-how-to-get-sacred-water/