Hi, this one was auto tagged instead of captioning, a lot of my early flux ones were. Honestly I didn't know what I was doing with Flux back then and just trained the same way I did for Pony models lol. But for captioning in general I use the auto captioner Civitai has on the onsite trainer and tweak captions as needed. It can only do 60 images right now but that's more then you need for a character model. I highly recommend to auto caption on the trainer even if you want to train locally. You can actually use it for free and download the fully captioned dataset to use with anything.