Η is vowel in ionic and modern greek.
But it's velar or even guttural in other dialects:
H turns into vowels in japanese and somewhere else (I didn't
remembere where, so I started this file to put it here afterwards)
Н is N in russian. and И is I which relates it back onto Η, which
is natural, because И is officially a form of Η calqued onto
russian looking just like Η and their Н was N, but then for
whatever reason they rotated those dashes counter-clockwise, and
boy it didn't make us happier, being more different from latin
than we even were. divide et empera as sociophaths say, fucking
cure those fucks already!