ok I love Nemisia w my whole being but sometimes. sometimes the thought occurs to me that she's been a hero/adventurer for approx. 5000 years
and as a result of this most gods are like "yeah you're too useful to us for us to let you die" which fuckin sucks and is 90% of the reason why Nem is that old (she's v smart but has a reckless streak yknow)
she probably has So much shit in her brain at all times and instead of figuring out a way to induce true death (which might not even *work* bc she tried it before and she still got yanked back) she goes "okay fine fuck it y'all want me to stick around? y'all want me to hero indefinitely so that you don't have to do it yourselves? okay fine I guess" and then Fucking Ascends
which takes (almost) everyone by surprise (mystra knew and was surprised it took her that long, & it's kinda really hard to surprise fuckers like ao)
Nem then becomes Lorekeeper and not much changes except she gets all sorts of Cool God Powers and finally, FINALLY learns to use martial weapons