Comment by chrismorgan

You can find them all with this UnicodeSet query (though the query alone naturally won’t show you the lower and upper forms):

  [[:Changes_When_Lowercased:]&[:Changes_When_Uppercased:]]

It’s a handy way of finding all kinds of things along these lines. Look at the properties of some characters you care about, and see how you can add, subtract and intersect them.