呢 (ne) is used at the end of a sentence to ask things like And you? or What about her? It normally answers a question that’s just been asked while directing the question to someone else.
你叫什么？ (Nǐ jiào shénme?) What’s your name?
我叫多儿，你呢？ (Wǒ jiào Duō ér, nǐ ne?) My name is Duo. And you?