Menma's so happy she finally has a friend (that isn't a cranky old dead cat, or likes to claim she's busting her because she's a ghost and that's what Ghostbusters do)~ Unfortunately, Anaru has no idea what's going on, since she can't see her. ):
Screw that plot point, she can see her just fine. It wouldn't be any fun otherwise.
Anaru seems like she'll be fun to have. Jey likes putting outfits together, and Anaru's one that can be put into almost anything~ I feel sorry for our friend that does our face-ups though, when searching for references for her using her nickname...
Menma is a Volks Dollfie Dream (Sister) Yui.
Anaru is a SQ Labs Haruka on a Volks Dollfie Dream body.