Kate Nash is the rare performer who will let you see her as a whole person. In a sold-out performance at the 9:30 Club on Monday night, Nash was by turns angry, quietly funny, rambunctious, vulnerable and always charming. Simply put, Nash wants you to know her many sides — and that they compose one person who will kick your ass.

Kate Nash is tired. It’s 9 p.m. and she’s on her first major U.S. tour, knitting a scarf in her hotel room in Atlanta and occasionally yawning. And for good reason — it’s been a busy couple of years. The 20 year-old English singer-songwriter wrote her first song and played her first live gig two years ago, then went from a spot in Lily Allen’s Myspace Top 8 to the top of the English charts…