I need my own character and I need to use it in LaTeX.
In LaTeX we have \={a} \.{a} etc.
How can I can create my own character? For example I have two glyphs, my version of tilde ~ and char a.
How to define a new character \~{a} with the specific character and tilde? Or how to add two tildes above 'e'?
Maybe creating a virtual font is the simplest way?

\~is already defined. I would choose a different name. – Steven B. Segletes Sep 14 '17 at 12:48