| Name | CR | Type | Environment |
| Acrochor | 8 | animal | warm hills or mountains (Nejeor V) |
| Aeon Guard | 3 | humanoid (human) | any (Azlanti Star Empire) |
| Aeon Guard, Aeon Guard Specialist | 7 | humanoid (human) | any (Azlanti Star Empire) |
| AHAV | 12 | construct (technological) | any |
| Akata | 1 | aberration | any |
| Anacite, Anacite Laborer | 7 | construct (technological) | any (Aballon) |
| Anacite, Anacite Wingbot | 1/2 | construct (technological) | any (Aballon) |
| Angel, Barachius | 7 | outsider (angel, extraplanar, good) | any good-aligned planes |
| Apari | 7 | vermin | temperate or warm plains |
| Apari, Apari Constituent | 2 | vermin | temperate or warm plains |
| Assembly Ooze | 1 | ooze (technological) | any urban |
| Asteray | 12 | fey | any vacuum |
| Atrocite | 10 | outsider (chaotic, evil, native) | any |