But [name]Elodie[/name] ISN’T one letter shorter, whether on paper or off the tongue. [name]Melody[/name] and [name]Elodie[/name] are both exactly six letters and three syllables.
[name]Elodie[/name] isn’t a briefer version of [name]Melody[/name], which is what a nickname is. It doesn’t make much sense to impose [name]Elodie[/name] on [name]Melody[/name] – BUT, like I said, if she decides as a child/teen/adult that [name]Melody[/name] isn’t what she likes, perhaps she’ll ask people to call her [name]Elody[/name] instead. But that would be her idea and decision and doesn’t really require any planning from you.
If what you love is [name]Melody[/name], name her that and be done with it – I just don’t see the need for [name]Elodie[/name] as a nickname given the info you’ve provided so far??