How to Get the Comrade Achievement
- Reach maximum friendship with Cereza in one save file.
There was three encounters you had to eat with her (Harpy / Destroyed Village / Picnic location) + the Bath.
She had a symbol ontop of her head at those times. You know you maxed her if all sigils in her shop can be bought.
Note: The picnic location is right before the final dungeon. Lower left of the map. The bath is somewhere in the fairy springs, right of the map but not in the village.