You  can put any head on any other mesh´s body without problem.

There are several ways to do this ranging from easy to very sophisticated.

But to get a "true" hybrid that works exactly like a standard figure,  you must be able to create a new neck in a modelling programm, adjust joint parameters, and do a cr2 hack.

Not too hard with some practice, but not for total beginners, either.

Do a search for "Frankensteining" and "Hybrids", and you will find a few tutorials and links.

I suggest you construct a few hybrid "Kits" like the various TenTens first to get a feel for the process, before you create your own hybrids from scratch.

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Here is MIKI´s head on AIKO´s body:

MIKI´s head on Posette´s body:

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Koji and James heads on Michael 3 and Michael 3RR´s bodys:

So MISAKI on AIKO´s body should be no problem at all.

Stahlratte