"Correct. Because well, I'm neither of them, and there's a very good chance I'd catch on to said hints, like I did, right away. And moreover, I'd expect them to be able to communicate with one another outside of the thread anyway, they make a lot of sense as Masons. And finally, if there was any one of them who would seek the other, it would be Lambdadelta seeking Bernkastel, not the other way around. This is because Bernkastel is derived from Rika Furude, who is one of the main characters from Higurashi. Lambdadelta is also associated with the main villain of Higurashi, and in flavour, Higurashi is described as an example of Bernkastel besting Lambdadelta. Lambdadelta then proceeds to rig the next game, Umineko, to keep Bernkastel trapped there (hence why Lambdadelta wants a tie result, so the game never ends). In terms of characterisation, Lambdadelta often fawns over Bernkastel, who in return is mostly condenscending and dismissive. All of this is to say, if either of them wants to actively seek out the other, it would be Lambdadelta seeking out Bernkastel, not Bernkastel seeking out Lambdadelta. And I've explained why I think Flower would be Bernkastel, between the two of them.
Now, you could say Flower is hinting to the real Bernkastel, somehow, but that would require her to have fairly intrinsic knowledge of the flavour to understand this characterisation and dynamic between the two, which I don't believe she has. As a result, she's probably just Bernkastel, if any, and doesn't care to hide this. And she'd have good reason to not bother hiding it too - Bernkastel (and Lambdadelta) are both effectively immortal, with only boredom being able to kill them (and even if they are killed through that, they can simply revive once their interest is piqued again)."