Je t'ai répondu pour Wandering Soul dans un autre post.
J'ai trouvé les pacts ici : https://gamefaqs.gamespot.com/boards/604160-radiant-historia/58266464
Eruka.
Divine pact - Invisible chest in the middle of the engraving in Holff Ruins Interior. (Symbol on the ground)
Protection pact - Left of the bar in Cygnus. (hard to see).
Sunlight Pact - Speak to the Npc south of the item shop is Celestia, (After having obtained the quest "The living legend") It should be by some flowers near the middle of Celestia.
Firelight Pact - Finish the Ultimate Dish. Obtain quest at 'Aht's Prayer' Node and go to Granorg to find a guy dressed in green at the market. To get Savory Boar Meat, go to Lazvil Hills at the 1st Node - choose any route and go to the south entrance. Savory Vegetables is at Cornet's entrance in the left field of cabbages, then return to 'Duty Revealed' Node and speak to the npc.
Stocke.
Soul pact - On the " The road perilous" node after completing the block puzzle, you should find some invisible barrels near the end of the area, bring the barrels all the way back to the start of the area and blow up the upper right stone (So that you don't have to drag both barrels) then walk inside the crevice area to discover an invisible chest.
Shade Pact -After you have obtained the quest "The living legend" Speak to the child in the weapons shop in Alistel during "The beginning" node, then go to a cave near the lazril river (this is the same cave with the trapped soldier. but don't go inside search around it.)
Fire pact - It should be an invisible chest behind and to the left of Alistel's item shop.
Death pact - "Battlefield missive" quest speak to the boy outside the weapons shop In Alistel during Alternate history chapter 3, receive the letter then go to "The Valkyrie" node and speak to the soldier sitting on a bench on the first floor behind one of the doors, return to the boy to complete the quest.
Aht.
Icestar pact - is in the deepest area of the imperial ruins before the boss, it is in a hidden doorway between a large pile of rocks to the northeast. (Very hard to see, I ran into it by accident)
Thunderstar - Invisible chest south of the weapon shop in Skalla.
Firestar - Reward from the sidequest "one and only" SH Ch.2. Talk to an npc in SH CH.2 in Granorg's inn, then go to node "The closed mine" go into the house next to the merchant and talk to the npc, go to Alistel's inn "The beginning", then return to the npc in Granorg's inn, then go to the Npc in Alistels, then back to the Npc In granorg's inn a final time.
Meteorite Pact - After obtaining the quest "The living legend" speak to the npc in Granorg's bar. Go to the Granorg sewers and make your way to the castle, You should find it near the castle side, it's invisible. Alternate would be that once you're outside of the sewers in the mid-way point, enter the next area, then check the upper left bars.