Jonas is a man born with the weight of the world on his shoulders. A man of opposites, Jonas often comes off as bipolar to those around him, however the cause of this is actually his need to deal with the "voices in his head" (the souls of those he has killed) which he constantly hears. Despite the constant chorus of murderers and monsters in his mind Jonas does an amazing job keeping their darkness in check, although when enraged he can sometimes become savage and bestial, giving in to those dark voices. Jonas has also proved to have a great love for humanity as a whole, which has become the driving force in his life. Jonas sometimes views himself as a monster, but one necessary in order to ensure the survival and continuation of the "normal lives" of those under his protection (effectively all of humanity). He is the man who does what needs to be done, no matter the personal cost.
Jonas is also a master of political maneuvering (and manipulation in general) despite not particularly enjoying politics. There are few people whom Jonas truly trusts, chief among those being Aubryn Darkveil and Cassandra Troy.
Romantic Relationships
Thanks to his rough human life Jonas also has a very hard time forming long-standing personal relationships and as a result gotten a reputation as being somewhat promiscuous among his female subordinates.