Bahumat,Eden,Odin,Greiver,Gilgamesh
Bahumat because he is a dragon
Eden is machanical angel
Odin is a various God in different religions and is known for cutting his own eye out to achieve immortality and ultimate wisdom
Griever is legened to be drawn from squall's mind by ultimecia or his ring.Ultimecia is rumored by designers of the game to be rinoa from the future if squall was to die, thus she has his ring. torn by insanity and years of greif when ultimecia(rinoa) fights squall she draws greiver from squalls ring, how you might ask well if you scan timiat it says " once a gf turned to a monster by ultimecia."
Gilgamesh is a samurai/demon you recieve after odin dies