Kuo-toa were extremely suspicious, as well as duplicitous, betraying trust for their own benefit so long as they believed they could do it successfully. They were easily willing to turn in family members they suspected of crimes to community officials, and as such were normally perceived as cruel monsters by most other races, but this wasn't entirely accurate.[14]

The mental oppression they suffered at the hands of other races broke the already-simple minds of most kuo-toa and as a result crazy