It's a woman… sorry had to point that out cause I'm a big Rumiko Takahashi fan.
Hmm that's interesting. I didn't know that thanks.
Yeah the "horns" in the shadows are the ears of Lucci and Jyabura's DF modes.
I highly doubt this is Jyabura's transformation..
HOWEVER, I could see that spoiler happening… It sounds like something Oda would do and it would be really funny.