For me there’s two separate participants, a ‘talker’ and a ‘listener’. My mind identifies more with the talker, because that’s the one that has agency. Since there are two participants, both of which are me, I talk in 1st person plural (‘we’ve got to do …’, 'we thought about this earlier’). I stopped being afraid of being alone after I started having an internal dialogue around the age of 11, since having a second participant in the conversation meant I was always in company.
My monologue hums… And when there’s some event /work/(or anything like late for a bus or work or something), it starts narrating the environment and condition with counting repetations(like steps, seconds) sometimes counting up and sometimes oscillatiory count(like in evens; 1-2–1-2–1-2–1…)