Vector Sol is one of the three vectors (legendary vectors in the OVA) used to merge for one of the three Aquarion forms (Solar Aquarion, Aquarion Luna , or Aquarion Mars). In the anime and OVA the three Vectors originally belonged to the Shadow Angels, but 12,000 years ago, Apollonius took the three Vectors along with Celiane and Scorpius, (or the mysterious third pilot that was never mentioned in the anime due to the page about Scorpius being erased from the Book of Holy Genesis). In the anime, 12,000 years ago, the three of them were used the Vectors to fight against the Shadow Angels, eventually being able to seal them. 12,000 years later Gen Fudou excavated the three Vectors from their resting spot. In the OVA, Apollo reactivated the Three Vectors along with Reika and Silvia. In the anime, it is mainly used by Sirius and Pierre.