well, considering Maribel dreams of being in Gensokyo at the time Yukari is sleeping, I'd say he really wanted to toss a bone to the people who come up with theories.
and not sure but doesn't she also dreams of being with Chen and Ran?
There used to be plenty of discussion regarding how Maribel's family name should be spelled; "Han" was what was settled on before the discussions took place. The more correct spelling, in my book, is "Hearn". The reason why, is the connection to a real-life historical figure: Patrick Lafcadio Hearn, who moved to Japan in the late 1800s and changed his name to "Koizumi Yakumo".