Hmm. Well, first off, I have DDNOS, not DID, because I don't have major memory problems. So not those 'classic' symptoms.
Before I knew, it was very chaotic.
On the outside: dissociative flashbacks; panic attacks out of nowhere; catatonic stupors (dissociating); severe social anxiety (or none at all); self-harm/mutilation/destruction/deprivation; AN; MDD; etc; etc; etc.
On the inside even more so. In my head there was constant arguing/screaming/crying/suffering/laughing (which I tried to hide); I felt like I was being haunted; I felt like I was possessed; I was so passively observing the others live my life that I didn't even realize what was going on; everything was just so out of my control; I was too overwhelmed and confused to live my life. I knew that things were far from normal, felt amazed that we could 'fake it' most of the time.
As for relationships, I, personally, was debilitated with social anxiety/agoraphobia, but Sonja has always been a nice/pleasant/optimistic/etc social being for the rest of us. NInchen couldn't talk - has only ever talked to our T. Jane wouldn't. Aiden doesn't care to, unless the subject was highly intellectual, on a matter that was of interest to him. Niva would interact with others, unless she was too mad at one of us to speak. Cedar was pretty sociable too, but not as much as Sonja… So 'I' must have been very inconsistent to others… Moody? haha

. From terrified to delighted/excited to despondent to incredibly shy/awkward to detached to hyped up to spiritual…
Our lives all fell apart eventually on every level in my early 20s (except for Sonja's - she just leaves when she can't fix things). Sonja actually used to go to T for us when we were younger, in our school years, because it stressed the rest of us out too much, so T was never beneficial to us then. But then we were debilitated - unable to work, to shower, to leave the house, etc. We saw no way out of our hell; we had no hope. We met our current T at 24 (he specializes in trauma), and decided to admit to him that we had never been emotionally present for T before, decided to make a point of changing that. We worked very hard, were functional within a few years, and have been thriving every since

. We did all the work - especially ninchen, but we could not have done it without our wonderful T