someone who often travels from place to place, especially without any clear aim or purpose

Kathy's always been a wanderer - she never stays anywhere for long. 凯西一直是个流浪者——她从不在任何地方久留。

In the book, he casts himself as a solitary wanderer in the metropolis. 在书中，他把自己塑造成大都市中的一个孤独的流浪者。