Lady Aribeth was in NWN rather than NWN2, with character model: 'c_aribeth.mdl'. There's also a 'c_aribeth_evil.mdl' model, which looks like a reskin with darker armor. Basically for NWN2 you'll need to do a port, starting with Neverblender. I'm not sure about the sword -- in HotU, she's just equipped with a +4 longsword. P.S. I you do go forward with this, I could certainly use a NWN2 model for the HotU reboot. Let me know if you need anything.