For Episode 14, the show is casting the possibly recurring role of a teenage African-American female who comes across as skittish and timid, having had her naturally curious and determined spirit tempered by years of crippling fear. That said, when put to the test, this lass can reach within and summon the strength to be a hero.
Source: http://tvline.com/2013/11/22/how-i-met-your-mother-china-flashback-spoilers-revenge-walking-dead/