Help with meeting The Dark Side

I've been dating someone with DID for awhile now. It's complicated, of course. He understandably has major trust issues and we are not officially in a relationship (though most people assume so at this point.) I don't mind...I'm horribly impatient but with him it is easy to deal with the unknown. I have been making a lot of progress with the host, as you seem to call it, and begun to recognize a few of his alters. Recently I met his protector personality, and after some major grilling on his part, we seemed to get a long very well.

Recently he was attacked by a dog. The combination of being violated, maimed, and allergic to the medication the doctor gave him has put him in a horrible place. He seems to like me taking care of him' ; he's fallen asleep to me stroking his hair a few times now, but I can see in his eyes how exhausted and sick he is. I've only talked to him over facebook the last day or two, but he keeps saying how last night he went further into his head and is on the dark side. I'm wondering if I'm about to meet a dark alter and if so, how I should approach it. How would you want your significant other to interact with a dark personality? Any advice or insight would be greatly appreciated. He is so incredibly worth it. I want to be there for him.

Thanks

Trigger Warning (self harm)
You could either meet with this 'dark' alter as though you met him for the first time or you could make introductions as he may not know who you are and fill in what has happened.
The new alter may not like you or may attempt to be agressive to you or scare you off with behaviors or do harm to the body. Tread carefully.
Good luck with your relationship.

The advice my T(Therapist) gave to my significant other was "to be tolerant".
I'm sure it must be hard for sig others, you don't know what to expect and there will be times you just have to roll with it, just like we have to...

I would say whenever you meet any new alter, just treat them as you would like to be treated, with respect and compassion, which it sounds like you would and are doing. Don't ask too many questions, let them tell you what they want in their own time, especially with the protector/darker alters.

Is your partner co-conscious? This can make a difference, I am, with us there is always someone there that is aware of the relationship and won't let the protectors/dark alters totally self-destruct my relationship...thankfully!

I'm surprised how easy it is to wait for him to tell me things. I am such a pusher, I crave knowledge constantly and have pushed a few relationships too quickly. He's so honest though, and willing to share. It's helped me to learn a lot of things about myself and improve my own personality.

I am very lucky that he is co-conscious. That has made it a lot easier to understand what he is going through. He has said it's like riding a bus. He can hear everyone talking in the back, drivers just switch sometimes. He said that he has two "dark" personalities that aren't allowed out, though. So the similar language of "dark side" has made me concerned that one of them managed to get out.

I'm going to check on him either tonight or tomorrow. I am prepared for the fact that this alter may be very mean or violent, but I want to check on him. Hopefully I'll be able to remember that while this is a part of him, it's a part he obviously doesn't like (hence why he locked it away.)