Collect the last Memory Flower to complete the quest "String Sound." Gather the surrounding items yourself.
We are currently trapped in an illusion. We need to follow the sound of crying and keep heading through the blue door, repeating this many times.
After repeating this a few times, you'll see Memory Flower #1 of "Bai Chilian" as soon as you enter the door, with a purple item on the right.
The other Memory Flower #2 of "Bai Chilian" is on the opposite side. Collect it to upgrade your health.

