Jaded but brilliant, has a hopeless addiction, and is insanely talented with technology.
He is, in a words to sum it up, jaded but brilliant. Despite this he can at points be very childish and impulsive. He has a sarcastic sense of humor that can border on just dark. Could be very aggressive due to his experience on his own and can also have intense mood swings, but is mostly the playfully indifferent type.
Ziv claims to have never known his mother or father and would much rather not delve into history. The real story is, however, that when he was about 7, a burglar broke into their house and woke the family. Being so young he was unaware of his powers, and emmitted a screech loud enough to break the windows in his house. The burglar and his father died of something of a heart attack and the mother was put into a coma, which she is still in. Officials were baffled by the case. He is easily irked by people trying to figure him out, however his style and mannerisms betray his will and speak of his life on his own, mostly in the streets. Hopelessly addicted to vicodin and prescription drugs, he is known to randomly disappear into a vivid world of his own. In a completely contradictory note he is very intelligent and tends to bury himself in logic and numbers while under pressure, leading to his love for technology. Ziv makes his money in various ways, including once having rather interesting, wealthy clients for anything but business meetings (and would MUCH rather not talk about it). Mostly, now, he sells drugs when he needs cash. Having lived in New Jersey all his life, he has always wanted to go to a place like Tokyo, and just so happens to have the money saved up.
Technology: including but not limited to "hacking", maintenance, etc. Was a wickedly good bassist ans cellist, and could still smash a tune if he were to try.