Maybe her brother's helmet? Dunno.
That was my impression, although it obviously wouldn't have been the one he was wearing when he kicked the bucket.
Y'know, when I first watched the deleted scenes last week, I was absolutely certain that it had to be Ivanova's brother's helmet that we saw sitting in her collection. Somehow, it made perfect sense that Susan would have kept a few trinkets over the years as a kind of memorial to those closest to her that have passed on. But after taking a look at some screenie's I took today, I'm not so sure about that anymore.
First we have Exhibit A, the helmet in question:
And now, Exhibit B, that of Ganya's helmet from In the Beginning:
As you can [kinda] see, Ganya's helmet does bear a slight resemblance to the helmet from the SiL scene (what with the red star in the middle and... well, that's about it), but I think it's safe to say that they do not share the same paint job.
Now look at Exhibit C (taken from one of Ivanova's flight scenes in "All Alone in the Night":
Clearly, the helmet from SiL is much more similar to Ivanova's flight helmet than it is to her brother's. However, it's still up in the air which one JMS
intended it to be. For the record, now my money's on Susan's.
And while we're looking at this scene, I noticed that Susan's also got a "Phobos Wing" patch sitting on the desk under Marcus' pike and next to her copy of the Offer of Amnesty:
Does anybody know why that patch is important? It's not one of the patches her brother is wearing when we see him, and I don't remember seeing it any other time during the series. So what is it?