In my mission log I see no "Companion" category. I see that Doc wishes to speak with me on my ship but this is a recent event.
Kira shows no Icon of the sort when I summon her, but, unless memory fails, I was supposed to go with her to some planet and help some people there. I'm pretty sure that at the time it was too hard for me and I didn't do it. Still I could be mistaken.
Is there always a Companion category "slot, or whatever it's called" when I pull up my log, or only when they actually have a mission to do with me?
Thank so much for your help!
The companion mission category is only visible when you have a mission related to a companion's story. If there is none then there is no mission. Maybe you did the mission and do not remember?