- "You mustn't cross this river yet. There is still a light within you, trying to protect you. It will now reveal itself to you at these shores so it can aid you. Behold..."
It is a guardian spirit that aids the human characters in the party. At the end of every battle, a character will gain Guardian Points to fill their Guardian Gauge (press X on the character's status screen to cycle between character and Guardian stats). Every time a character dies, they will receive a new Guardian based on how full the Guardian Gauge was. If the Gauge is yellow, the new Guardian will be weaker. If the Gauge is red, the new Guardian will be stronger. The fuller the Gauge is beyond the point it turns red, higher the chance that the new Guardian will be more than one rank above the old one.
If the Guardian has a stat higher than its host, that stat will receive a bonus. If the opposite is true, then that stat will be reduced. With the exception of the Protagonist, human characters can learn the spells of their current Guardians, but not skills (both physical and magic). If a character has all of its skill slots full and gains a new Guardian, some of the new skills will overwrite the old ones without any control from the player.
- The Guardian System was later refined and used as basis for Personas.
|Hazama's Chapter - Manga - Kahn|
|Playable||Tamaki Uchida - Yumi Shirakawa - Shinji Kuroi - Reiko Akanezawa - Akira Miyamoto - Amon - Ideo Hazama|
|Non-playable||Nova - Akiko - Otsuki - Chefei - The Emperor - Lucifer|
|General||Karukozaka High School - River Styx|
|Expanse||World of Pride - Gluttony - Sloth - Envy - Wrath - Greed - Land of Nomos - Inner World|
|Terminology||Guardian - Expanse - Moon Phase System - Sword fusion|
|Lists||Guardians - Demons - Bosses (Hazama's Chapter) - Skills - Items|