My dreams, too, fade into day.
- —Gran Kiltias Anastasis
Kiltias Anastasis (大僧正アナスタシス, Daisōjyō Anasutashisu?) is a Helgas and the current Gran Kiltias of the Kiltia sect in Final Fantasy XII. He is a Dreamsage, able to enter the dreams of others, who dreams in the temple on Mt. Bur-Omisace. In his dreams, he sees more than those who are awake. In many terms, he can be called as the grand sage, seer and also a grand bishop to all of Ivalice as he is the leader of Mt. Bur-Omisace which is regarded as the holiest place on Ivalice as it is the nearest to the gods.
According to rumors heard by one of the refugees in Mt. Bur-Omisace, the Gran Kiltias's position is above everyone else's in Ivalice. He is said to be able to silence kings, or even an emperor with just a single withering glare.
Visited by the player party on Mt. Bur-Omisace, Larsa meets up with the Gran Kiltias and Al-Cid Margrace to discuss how best to prevent the coming war. Larsa learns from Al-Cid that his father has been killed and that his brother Vayne has ascended the throne, making peace negotiations impossible.
Ashe, wanting to strike at the Archadian Empire, and knowing that revealing herself now would be pointless, asks the Gran Kiltias for a power greater than nethicite. He suggests going to the Stilshrine of Miriam, where the Sword of Kings lies. While the player party goes to the shrine, they leave Larsa with the Gran Kiltias who brings him to the inner sanctum.
While the party are at the shrine, Mt. Bur-Omisace is attacked by the Empire. Judge Gabranth and Judge Zargabaath take a non-violent approach, providing troop transport and escorting Larsa back home. Judge Bergan, with the power of manufacted nethicite, has different ideas. He slaughters anyone who gets in his way, including the Gran Kiltias. The party arrive too late, and witness Bergan standing over the Gran Kiltias's body. The Gran Kiltias's death results in the release of both Fafnir and Piscodaemon.
Anastasis is Greek for "resurrection". He is the Gran Kiltias. Gran is a Spanish adjective term for "grand" or "great".