I'm assuming that, even if you are just temporarily possessing it, you're still able to use your original Necromancer abilities through your minion? A question, though; if you use Possession to control a minion, does your main body go inactive or can you act with 2 bodies? Though if it's the latter, it makes me wonder whether or not your temporarily possessed minion body can even use your Necromancer abilities? Some clarification would be nice.
And another question; if you're a Bleeder with Bloodwell, does Nos (Bloody Rose Sword) still enjoy your blood? Or does the 'bond' invalidate Bloodwell's "lackluster" trait in this situation? Or does your blood being its favorite not invalidate it eventually getting tired of drinking just your own blood?
Lastly, some additional comments; I feel like Beine (the cloak) is the only weapon where I can't really get a sense of its personality. Just my personal opinion. I mean, there are other weapons with sparse descriptions on their personalities, but you can at least try to guess some stuff from what's there. For Physe, even without the description stating it, I can already tell it's bloodcrazy. As for Nos, I'm just extrapolating from the 'picky eater' bit, but I personally think of it as being a glutton who's always looking for its next meal. And perhaps Armachs just wants personal attention from its owner? Beset could also be animalistic. The "meat eater" type of girl you'd see in Taiwanese shadow theater performances. And lastly, Reckor could just be plain mysterious.
But Beine's description doesn't really have any indication of what it's like. Same with Xav (Crystalfire Skull), Zer (Outworld Coffin), and Kattos (The Warden). Drawing a blank slate for what they could be like.