Meet Matcha! A adopt from https://toyhou.se/Rezika-thorn/art !
If you couldn't tell just from a look at this... uhh... cat? Fox? ...dog? I... I ain't entirely sure just what this strange little alien is, but the point stands! If it isn't made obvious just from a look here at her ref, she is a Goddess of Music! If you touch one of the notes that she can freely summon across her entire body at will, it will play the corresponding note! Pet her and you can probably get a full song!

Although, if you want to try and pull off the latter half of that statement, might be best to ask for permission first. Kinda rude to just walk up to someone and just start petting them cuz you wanna hear some music. A important part about her powers however is that she can even fully make the notes and musical tracks completely disappear and remain hidden so that she can pass off as a normal person! Or at least as normal as one can try to be when you have notes visible in your very eyes >.>