Storyteller is very confident in himself and his abilities. Growing up mostly respected by his peers, he sees nothing as too big a challenge and will do whatever it takes to accomplish his goals. What his goals are is unknown.
Storyteller is a control freak; while he respects people's boundaries, he is known to push them and wear people down to get what he wants. The most prominent example of this behaviour is Teodors; Storyteller says that he can get Teodors to do 'whatever [he wants]', though appears to not act on this. Storyteller has been known to be both physically affectionate and physically violent with just about anyone, including close friends.
Gabi comes from the name "Gabriel", meaning "God is my strong man". This form was chosen because it appears androgynous.
Kelemen comes from the name "Clement", meaning "merciful, gentle".
The nickname "Storyteller" appears to take on many meanings. It could either illustrate how much he talks, how much he talks about other people, or that he is a good liar.