Board Thread:General Discussion/@comment-25176701-20160401201831/@comment-25176701-20160401222617

"I think Luna's been hiding since Season 1 and that's why Lincoln suggested that they should go with him because Luna will accept the Deliquents who wants to run away from the Grounders but he doesn't know why she's in hiding. (Maybe Luna is known by all Grounders to take in people who wants to hide.)"

But Lincoln said (in Wanheda Part 1) that Luna couldn't take him and Octavia in because she was in hiding and didn't want to risk the attention. But in S1 and S2 Lincoln said that Luna could take them in, so that must have meant she wasn't in hiding then.