memories are separated according to the fve senses and emotions and happy is an emotion so yea you can have a memory piece that is the memory content of happyness for example I have a memory piece that iis the memory of swinging on a swing and teeter tottering and blowing bubbles and that piece of memory matched with the fact that I had been abused while playing on playground equipment. The happy swinging on the swing set got stored separately then the feeling of being touched, and separately from the smell of the dirt, and my abuser and separate from the sound of my abusers voice.

Basically for each whole abuse memory it is broken down according to the five senses into separate memory pieces of -

the tastes of the situation,
the sounds heard and made during the situation,
the smells smelled during the situation,
the sights the person saw during the situation,
how the person was touched or what the person was made to touch,
and each of the emotions felt during that situation also is separated into separate memory pieces.

Each one of these separated pieces of memories contains the heart rate and breathing rate the person experienced when experiencing that specific sound, taste, touch, smell, sight and emotion. And the person acts out the same behaviors and memory content when the person is triggered into the memories being replayed automatically.

It is because of the way the brain separated memories according to the five senses and emotions that a typical DID can have over well over 200 memory pieces being replayed when a person gets triggered, be it happy, sad, excited, you name it.

Sounds complicated? Wait until you get to the fun (being sarcastic its not really fun) part - trying to match the separate pieces of one memory back to form one whole memory again of this sound goes with this taste and this sight and this smell and this touch and this emotion. During the co consciousness and integration process other wise known as the memory recall process or remembering repressed memories.