Three-demon fusion

Three-demon fusion or triple fusion (3身合体) is a fusion which requires three demons to perform. In Shin Megami Tensei, Shin Megami Tensei II and Shin Megami Tensei if..., this fusion uses another charts which differ from the conventional two-demon fusion. The race of the resultant demon is determined by which species, instead of races in two-demon fusion, of the ingredient demons are.

Three-demon fusion is important that demon of certain race can not be created via two-demon fusion, namely Deity, Tyrant, Seraph and Vile in Shin Megami Tensei. In Shin Megami Tensei II and Shin Megami Tensei if..., three-demon fusion always creates Light or Dark demon except for result that generates a random demon.

Common rules

 * Player's picking order of the three ingredient demons are irrelevant.
 * Determine the intermediate result in the first fusion chart by the species of two lowest level ingredients among three.
 * If there are two demons share the same highest level, the "lower" species will be used for the first chart.
 * In the second fusion chart, combine the intermediate result with the species of the highest level ingredient to get the resultant race.
 * If the two ingredients for the first fusion chart share the same species, the end result with be the one rank higher demon of the same race of the thrid ingredient.

Shin Megami Tensei only rules

 * Expected resultant level is the average of all three ingredients plus 8.
 * Use the calculated level to locate the demon of the expected race just higher than the expected level.

Shin Megami Tensei II and Shin Megami Tensei if... only rules

 * Expected resultant level is the average of all three ingredients and then revised by any of the following rules:
 * If all three ingredients are Neutral, minus 4.
 * One Light demon, no change.
 * Two Light demons, plus 4
 * Three Light demons, plus 8
 * Use the calculated level to locate the demon of the expected race.
 * Whether the higher or lower demon should be picked is determined by the protagonist's level.
 * If the protagonist's level is higher than the expected level, higher level demon will be picked, or vice versa.

Three-demon fusion with Dark ingredient demon

 * One Dark demon: determine the expected demon by other two ingredients with two-demon fusion chart and pick the demon of one rank higher, then fuse again with the Dark demon with two-demon fusion chart.
 * Two Dark demons: determine the expected demon by other two Dark ingredients with two-demon fusion chart and pick the demon of one rank higher, then fuse again with the remaining demon with two-demon fusion chart.
 * Three Dark demons: result will be three ranks higher than the highest Dark ingredient demon of the same race.