There's not much to be said about O-1's personality as there's very little info known. One cannot even be sure if O-1 exists, never mind attempting to figure out truth from fiction when it comes to facts about O-1. There are a few snippets of "facts" about O-1 that seem popular in the notail population, mainly those on Eukaryote, but none of these facts can be confirmed, so everything below should be taken with a side of skepticism.

O-1 is either a bitter creature, or a mischievous one, some even say it's both.