Julian Vale
Everyone's dream girl is a collage until you subtract. Long forms make committees. Pick an archetype, three traits, a voice, a couple of interests. Then talk until she contradicts the form, and keep the contradiction.
Realistic or anime
That's the first honest choice. GoLove does both and attaches a voice. Candy is the visual looker if anime is the whole reason you showed up. OurDream if you wanted cinematic stills of a locked face and can live with a more formal chat.
Don't stack twelve traits. Don't write a novel in the backstory. Name a job and a tell. Then go talk to her for a week before you generate a hundred photos.
The first week
If she still sounds like the form on day eight, you over-specified. If she sounds like every other girlfriend on the app, you under-specified. The useful custom is the one that gives the model a wall and a job, then lets her accumulate a history. That's the dream part that isn't a filter.