The Oni stuff and her dynamic with Kaidou are for more interesting than the Oden obsession.
I legit don't think there was any value add to the Oden thing. It's all negative for me.
She does feel kinda fanfic-y ngl. I hadn't thought of her like that before, but I see it. Kaidou's kid, all three Colours, Mythical Zoan DF, super friendly and easily makes friends - I see how that can also be seen as a self-insert type of character, not of Oda himself but someone he knows.