Nick is mostly a loner. He is usually not seen around towns, rather travelling the desserts. However, being a bounty hunter, he is well known to many, especially in smaller, secluded towns, where outlaws usually hide.
He was not born blind. He lost his eyes while he was still not experienced enough as a bounty hunter.
Nick acquired most of his robotics to compensate for his lost eyesight and still longs for revenge for what had happened