Three-demon fusion, also called triad fusion, triple fusion or ternary fusion (3身合体), is a type of fusion which requires three demons as components. In Megami Tensei II, Shin Megami Tensei, Shin Megami Tensei II and Shin Megami Tensei if..., three-demon fusion uses separate fusion charts which differ from the conventional two-demon fusion. The race of a demon created through triple fusion is determined by the species of the demons that are selected for the fusion rather than their respective races as in two-demon fusion.