The Esper symbol has been explained, but I noticed one that is slightly different on the monsters in PSII. The Fiend, Caped Ones, and Wizards all have a white symbol that is somewhat similar, but not the same as the Esper symbol that appears so beautifully next to all message topics here. The Xe-A-Thoul symbol is the same in PSIV as their PSII predecessors.
Here are the screenshots of these vile beasties:
PSII
Caped One: http://www.rpgclassics.com/shrines/gene ... pedone.jpg
Fiend: http://www.rpgclassics.com/shrines/gene ... /fiend.jpg
Wizard: http://www.rpgclassics.com/shrines/gene ... wizard.jpg
PSIV
Xe-A-Thoul: http://www.rpgclassics.com/shrines/gene ... -thoul.jpg
De-Elm-Lars: http://www.rpgclassics.com/shrines/gene ... m-lars.jpg
Gi-Le-Farg: http://www.rpgclassics.com/shrines/gene ... e-farg.jpg
Le-Faw-Gan: http://www.rpgclassics.com/shrines/gene ... aw-gan.jpg
Anyone see these anywhere else? It's got me wondering!
And speaking of other symbols; Juza and the enemy Radhin have a unique one too:
Radhin: http://www.rpgclassics.com/shrines/gene ... radhin.jpg
Juza: http://www.rpgclassics.com/shrines/gene ... s/juza.jpg