I'll have to check those books out. I liked 1Q84's weirdness. I have Wild Sheep Chase actually. I'm thinking about starting it soon.
Fuka-Eri was quite intriguing to me too. (SPOILER ALERT). I was mostly interested in the parallels between her and Aomame– growing up in a cult, her face being "off-balance" like Aomame's (her ears are different sizes or heights, one of the two), her being the conduit for Aomame's pregnancy. Even before the maza and dohta elements were introduced I suspected that they were the same person. Murakami seemed to tease this bit of information. Particularly with the Aomame's/the dowager's/Tamaru's plan to have Aomame get plastic surgery after she killed leader. But Tengo's last conversation with Komatsu hints pretty heavily that Fuka-Eri is, in fact, Aomame's dohta. From the book:
"'Couldn't you hypothesize that the Fuka-Eri we met is actually the dohta and what was left behind at Sakigake was the maza?' (Komatsu)
...
But put it that way, and it started to sound possible. I have no periods. So there's no chance I'll get pregnant... An alter ego can't reproduce itself– only the maza can do it."
The maza that got pregnant the night of the thunderstorm was Aomame. I think Fuka-Eri's distant nature might be chalked up to her being a "shadow" of Aomame, although this not might be the case considering other possible dohtas (Kumi and Ayumi and possibly Tamaki might be dohtas of Tengo's mother; the NHK collector knocking on Aomame's and Ushikawa's doors being Tengo's father's) have more "up front" personalities. Tengo and Komatsu also talked about the possibility and probability of there being multiple dohtas. "Maybe there is one powerful, main dohta, and several weaker auxiliary dohtas, and they function collectively." So it is possible for Fuka-Eri to have dohtas of her own as described in Air Chrysalis.
I think the maza/dohta framework can be used to explain a lot in the 1Q84 universe. Not that it has to be explained.
Edited by Polymorphia - June 22 2016 at 19:55