This is model is based on Illustrious XL and it needs checkpoints compatible with it to produce the best results. Unlike my previous model, this is using a basic LORA design, so I couldn't add it with my previous LyCORIS version (https://civitai.com/models/1063159?modelVersionId=1193135).
The facial markings and the rest of Belldandy's facial features are all included in the "Belldandy" tag, so no extra description is necessary. Adding them on top of that tag is going to mess them up, either their shape or color.
For her outfit you can try "goddess dress" and in some cases "golden trim" although the latter isn't always necessary. I should note that I didn't train the model to explicitly make her official goddess outfit, so it won't be perfect. On the other hand, this model is more flexible and handles more outfits without serious problems.
Use "ponytail" to make sure that she's generated with her default ponytail. I tried not to have that built in like previous models of mine, since I wanted to make her model a bit more flexible. It's not always necessary, as there's a strong bias in the training data to have Belldandy with a ponytail, regardless of whether she's prompted with "ponytail" or not.