Martel Yggdrasill

Martel is Mithos's sister and one of the four seraphims and the apparent deity worshiped by the Church of Martel—a monotheistic religion, with aspects derived from the real-life Roman Catholic Church. The Church is nearly identical in both the worlds of Tethe'alla and Sylvarant, save for the hierarchical system present in Tethe'alla which has a Pope as its spiritual leader. Martel is a half elf and was banished from Heimdall along with Mithos. She was murdered by a human who was attempting to take control of Mana. After her death, Mithos places Martel's soul in the Great Seed with the use of a Cruxis Crystal. Mithos then seeks to revive Martel no matter the consequences.

Near the end of the game, Mithos succeeds in doing so, but Martel admonishes him for the actions he has done. After the germination of the great seed, Martel's soul merged with the great seed's soul. She then becomes the Summon Spirit of Yggdrasil, the new World Tree of Mana that Lloyd names at the end of the game as proof of the pact between them; although the name Lloyd chose is never mentioned, It is presumed to be "Yggdrasil" as that is the World Tree's name in Tales of Phantasia.