Reimu isn't outside the current boundaries, though. She checks all marks of being implemented. It's just that she, as a character, isn't popular enough.I didn't mean Reimu herself would sell passes. The selling point is her being a pick that is outside of the current boundaries of DLC fighters, mainly because Touhou is indie, also from a new genre, even being a girl sells passes at this point.
Joker did the same with FP1 while he wasn't hugely popular as a character, he was also kind of niche (a bit like Terry). But he was a good first pick because he was the most out there pick of the 5.
The first pick doesn't really need to sells passes by itself because it can sell passes for every character people think there could be in the pass.
Sure, Persona as a franchise is kinda niche but not Persona 5. It hit like a bomb comparatively and is hugely popular.
Joker created a lot of hype due to various circumstances and I don't see that happeng for Reimu. I would even expect contempt from many people as some "unknown anime girl no one cared about" gets chosen as the first entry. Not even the gender fanatics (being a very vocal minority) can change that.
The first pick doesn't "need" to sell passes and Nintendo has shown time and time again that they don't always follow the most popular route. Still, I don't see Reimu as FP6. I kinda don't see her in the pass at all but thats my pessimissm speaking.