Wri Kelp

Wri is a species of kelp commonly found around Gaia. It also known as 'broad noodle kelp' due its shape.
Wri kelp is commonly used to help awake people from fainting, by improving the patient's senses. It is not recommended for patients suffering from hallucinations, which may in turn, worsen them.

In the visual novel, two students faint as the boat empties itself of the spirits that were attached to it. Lo Chen gives Shui Ling some wri kelp to help awaken them.