Note (6-22-25): I added my recent Julia character model to this (now a) 3-in-1 character model; this version has a modest 2.5k steps and does a pretty good job of replicating the anime (of course, Faye will still look the best due to the most screentime/comprising the bulk of the dataset), while also being flexible enough to pair with other style models. This will likely be the last version (unless I add Ed or someone else later).
Note (6-16-25): I added an alternative version that has minimal training steps and should be more flexible when paired with style models and the like. Use the flexible version if you want to make images of Faye with other style models. Use anime-accurate V2 if you want to get as close as possible to looking like the anime; I'd probably not recommend V1 because V2 improves upon it. If using the flexible model, pre-trained keywords faye_valentine and cowboy_bebop are recommended; in the flexible model, the first image is with faye_valentine and cowboy_bebop, while the 2nd is not.
A Patreon member wanted to see some pictures of Faye. Since I'd wanted to make my own model of Faye for a while anyway, this gave me a great excuse to make my own! However, I knew immediately that I wanted to include the best anime doggo in this model (even if Ein is generally paired with Ed in the anime)! So this is effectively a 2-in-1 of Faye and Ein! Solo and duo images are both possible, at least when generated locally on GUI; for the latter, I recommend an extension, like Forge Couple.
While I attempted to replicate the red dress Faye wears in Ballad of Fallen Angels, there wasn't enough screentime to make it work; you can get somewhat close, but it doesn't do a very good job, so don't expect to make images of this outfit, I'm afraid.
Obligatory self-promotion: consider supporting or commissioning me at https://www.patreon.com/MetalChromeX so I can continue making cool crap for you all to enjoy for free!