Yuna High Summoner SUMMON: Yu-Gi-Oh! Aeon: Blue Eyes White Dragon

Aeons are the physical realization of the fayth #39;s dreams. The fayth communicate with summoners who pray to them within the Chamber of the Fayth, and establish a mental link between the fayth and the summoner. Using this link, the fayth gives their dream a physical form: an aeon. Aeons are powerful creatures only a summoner can use in battle. Most aeons resemble their respective fayth, so it can be assumed the aeon takes on aspects of the person whose soul is sealed inside the fayth statue. Many summoners can communicate with any one fayth to establish a mental link with them, enabling them to then summon the fayth #39;s aeon, but only one summoner can call on a particular fayth #39;s power at any one time. This is why during the aeon duels two of the same aeon cannot battle one another. (The Dark Aeons are an exception.) The fayth are likely the aeons themselves, or otherwise are in control of them, as evidenced when Bahamut #39;s fayth encourages Yuna to call the aeons in her battle with Yu Yevon, saying: #34;Promise me you #39;ll call us? #34; and #34;We aeons...call us!! #34;. This is further supported by the connection between Seymour #39;s mother and her aeon, Anima. The aeons give the summoner the undying loyalty for one thing in return: to stop dreaming and be at peace with the final destruction of Sin. However, if the summoner summons the Final Aeon to vanquish Sin, Yu Yevon at its core possesses the Final Aeon, killing the summoner, and turns the Final Aeon into a new Sin, perpetuating an endless cycle.