Daiba is a powerful Kushan sorcerer. He was a close adviser of emperor Ganishka, and the Pishacha gana leader, overseeing the harashada who control said troops of Kushan military.

Daiba is wise and cunning, preferring to observe Guts' fight with the Makara before engaging him. He views the foreigners as savages, but shows respect for their magical abilities. According to him, he wants to establish a magical empire.

Daiba was loyal to Ganishka and always by his side, but spoke his mind when the situation demanded it, as shown when Ganishka offered Guts to serve him or when the emperor wanted to use the Man-Made Beherit; on that occasion, Daiba told him to at least try it on someone else before he tried it on himself.

As an elderly man, Daiba constantly remarks on how the younger generations disrespect their elders and are weaker than them. Nevertheless, when living in Falconia, he's shown to be quite good with children and generously reward those that helped him.