Walkthrough - Day 1

Main Plot
Go introduce yourself to everyone in town.

After you've talked to everyone, talk to Tabasa again. He'll ask you to help look for Gardenia's hair ornament. Head into Dozing Forest to the west. Keep heading west to the cliff. Defeat the Witnessing One.

Deliver the hair ornament to Gardenia. Go home and read the note.

Guilt Events
None.

Where It Stops (Day 1 Only)
Talk to the Incarner on the path into Dozing Forest. Give them some words of encouragement. You'll get a Super Ball, and they'll show up again later on.

Helping Hand (Day 1 Only)
Talk to the Incarner inside the tree before fighting the Witnessing One and hear them out. Return afterward for a Doubt Bracelet.