Direct answer
The mist spreading from the Forest of Echoes threatens Teradea, while helping Guardian Spirits revive the land becomes the larger mission. The official premise connects the forest mystery to supernatural restoration without revealing the resolution.
Connection dossier
Confirmed anchor
The Forest of Echoes is the named origin of the mist.
Relationship
Guardian Spirits are allies in reviving and revitalizing Teradea.
Evidence boundary
The cause of the mist, number of spirits, powers, and ending remain unrevealed.
How to use this page
This page explains the central narrative connection without inventing lore or spoilers.
This URL keeps one decision or gameplay purpose. When verified information changes, the existing page will be updated rather than spawning a competing near-duplicate.
Evidence boundary
Not yet confirmed: exact unlock requirements, numerical values, platform-specific technical behavior, and launch-day route details are not added unless Natsume or reproducible gameplay evidence supports them.