Posidonia used to live in Queen Thalassa's sea realm until she was caught leaking information to coastal kingdoms in exchange for gold. Queen Thalassa found out about this and sentenced Posidonia to a life away from the oceans of Petra.

After her expulsion, Posidonia docked in the seas of Elektra, and she happened to be one of the very few lucky underwater monsters transformed by Nebula thanks to her plant body, which absorbed all the nutrients from the sunshine.

With her new powers, Posidonia has no intention of staying in Elektra. She wants to go back home. However, she has yet to decide if she wants to apologize to Queen Thalassa and become her best ally or if she prefers to shake things up and take revenge for her sentence.

Posidonia is a Nature Support monster with Tortures, Healing, and Reverse Healing skills.

Evolving Trait:
Rank 0: Anticipation
Rank 1: Immune to Tortures
Rank 3: Status Caster - Gains Nature Protection at the start of the battle