Chloe didnt exist in the original material but was a re-imagining of a male character in the novel so that sticks a rather big thorn in the first part of your idea.
I think the whole point of the chair moment was simply to convey in a sense how lonely Holo was, and how important to her her real friends have been, to remember things they did even hundreds of years later, when there are so many details she cannot remember.
Holo, reading between the lines, has not had that many true friends or loves since leaving the north and her own kind, and that loneliness shows sometimes.
PS I'm sure one of the other threads (like Q&A) would have been suitable, this one has been dead over a year
