I think the point Yamato was making about the D name was that the captain oden sailed under, Roger, has D and so do Luffy and Ace signifying in her mind even more the idea that it's fate Luffy is here to beat
Thing is Govt called him Gold Roger(if I recall properly). So it doesn't make sense for her to know abt D as she never saw him face to face.
Also Ace wasn't a WB pirate when he was in wano. There was no tat on his back and you could see the spade pirates and their cat in the one panel
Point is not that.
My point is Ace the descendant of Roger was right Infront of her. Since she believe so much that she's Oden then she should have taken the opportunity n ran away wit Ace as that way she would have connected with Roger in one way.
There's a Chinese myth about koi climbing a waterfall.and becoming a dragon. Also conveniently how do you get to wano? Up a waterfall.
But it was Carp which carried ppl to Wano not koi
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But I got the point. Still kinda crazy that a fish df turn into dragon df lol.
Robin has been spotted before during this arc. I remember wanted posters of her and a few others being distributed in Wano. So, BM could have learned about it during her stay on Onigashima. Though, in the end it doesn't really matter as it could be she just assumes she's there or that she wants to be sure nothing happens in the case she would be there, which wouldn't be a far-fetched assumption as it's common knowledge she's part of the Strawhats.
I don't really consider that to be a loophole as Robin learned at a very young age how to stay off the grid. Eventually she became part of Baroque Works, which was a secretive organization on itself. Even for BM it would be quite a hassle to find her. Her information gathering network is impressive, but you shouldn't overestimate it either as it's not like it's omnipotent.
Additionally, BM herself just indicated in this chapter that she was betting on Pudding, but that she can no longer wait for her to 'awaken'.
I doubt her library is what's currently on her mind and as far as most of them are concerned, Momo is pretty much useless. In their eyes the only value he has, is that if he dies, this rebellion will be broken. Oden was able to earn some respect for his skills and charisma, Momo not.
The posters were made by Shogun's henchmen n distributed in Wano after BM was taken to Onigashima.
I doubt Shogun will discuss abt this wit BM(or any of the underling of Kaido/Shogun will discuss it wit BM as she's still an enemy).
Rather he would discuss it wit Kaido who doesn't give a shiit abt SHs Crew as he only care abt strong pirates like Kidd, Drake, Apoo(we don't see there crew).
And we know SHs messed wit BM from FI arc. If she needed Robin I m pretty sure she would have asked for Robin when she captured Luffy n Nami in her library.
So all of a sudden she asking for Robin doesn't fit. Rather if there was a segment where she forces Pudding in this arc n Pudding gave up then I can understand her desperation.
I mean she waited for how long 1decade 2decade prolly more. Why not lil more. She just enter into an alliance wit Kaido who still doesn't trust her completely. Telling him that look Robin can decipher your Poneglyph could actually hurt her more than Kaido (as she already have Pudding who once awaken can read it).
Now we know that Momo doesn't know how to read poneglyph but he has already exhibit extra ordinary abilities like talking wit Zunisha, transforming into Dragon n den there's obviously leadership qualities as he's a kozuki.
He's last of a kind whose ancestors created Poneglyph. She kept all types of creatures in her library. She doesn't care abt Wano or the rebellion as Wano will be going to vanish soon (Kaido gonna drop Onigashima over Wano).
So if there's nothing left of Wano then rebellion itself will die (prolly the biggest reason Kaido wanna drop the island on Wano).
So why not save the last specimen in her library?
Afterall she wants every strange/weird creature in her island.