So a bit more about what's going on inside me that led to this question...

I've been opening myself up to different internal "voices", letting them talk. In the process, I have found distinct portions/parts of myself.

The little boy/child (sometimes a boy, sometime genderless) - age roughly 4. He seems to hold joy, hope, love

The older boy - age roughly 10-12, definitely a boy, he is structured, rule based, distant, emotionally cold, doesn't want anything to do with anyone, precise, neat, ordered, perfectionist, Violent ideation come from this place.

The younger girl - age roughly 11-14, definitely a girl, romantic, critical, emotionally explosive/reactionary

Critical voice don't know where that comes from.

There is an I in there that is different than these.

So yeah, the internal family systems sounds like a good possibility. It is just odd that they hold significantly different traits, genders, emotions.