CAST is one of three playable races in Phantasy Star Online.
CASTs are intelligent and sapient androids exhibiting a will of their own. They are unable to use techniques and do not gain any MST stat or TP. In exchange, their other stats are somewhat higher, they slowly regenerate HP when damaged, can set traps, can detect and target enemy traps from a distance, and are immune to some status effects.
The following Phantasy Star Online classes are CASTs: