Me, I can outline that like. Naming character "-" or "--" so I can keep them apart -- and put them in the character list to note down any things I have figured out about them.
But I can't write about them like that. I need a name. A good name. One that manages to convey something of who the character -- personality, position, age, etc -- is without being too blatant about it.
It can mean an outline hanging in Limbo for a while while I hunt through baby name books and online sources.