Any chance to get a superscript directly on top of subscript in Unicode?

Unicode provides subscripts and superscripts, so I can do this:

x²

And this:

x₅

However, combining these two I get:

x²₅ or x₅²

Which looks badly.

Any chance to get the superscript directly on top of the subscript in Unicode?

For clarity, this is what I'd like to achieve:

Your issue is not with Unicode but with the font you use. Technically, every font could use negative kerning to move subsequent super- and subscripts on top of each other. One font that does this is Linux Libertine (if you put the subscript first):

On the other hand, this is quite rare. Even STIX, which is specifically designed with mathematical typesetting in mind, does not have this feature.