Forest Spirit "Medi" is an evolution material unit, and therefore cannot be placed in a party.
In the Shrine, its name is Wood Fairy "Medy". This is most likely due to an automatic translation of the original Japanese text.
A fairy born of Earth, one of the five elements which make up Raktehelm. It is said that they like to live in the depths of forests. They are very laid-back, and adventurers who listen to their calm voices feel intense drowsiness. When they awaken, the Medi have disappeared, so for a long time, people thought they were illusions that the forest showed them. The purified Earth contained in their bodies makes it possible to release the hidden power of the heroic spirit.