The Nami slander going on in this thread is offensive. How dare any of you think Nami could be involved in Summer's disappearance in an intentional way? She really doesn't have the right kind of personality to hide a dark secret like that for years.
It's been a while since my last playthrough, but don't Nami and Nika have a secret about Summer's disappearance that hasn't been revealed to us yet? I think there was a scene where Nika told Nami he'd have to tell Amber something about their past, but I might not be remembering things correctly. If Nami had anything to do with Summer's disappearance Nika would have never forgiven her.
It's been a while since my last playthrough, but don't Nami and Nika have a secret about Summer's disappearance that hasn't been revealed to us yet? I think there was a scene where Nika told Nami he'd have to tell Amber something about their past, but I might not be remembering things correctly. If Nami had anything to do with Summer's disappearance Nika would have never forgiven her.