Type > Convert to Outlines
I don't recall if you select the frame with the Selection Tool or highlight the character(s). You'll get it.
A better solution, in my opinion, would be to make your own font and use that character (you can probably find a way to do this as a nested or GREP style) so the type remains edidable.
Before you say you cannot make a font, see Adobe Community: [Ann] IndyFont Demo: make your own (1 character) font
This is a truly amazing script from our own regular contributor Theunis deJong, AKA Jongware. The demo will allow you to make a single character and save it as a custom font that you can apply as a character style.
For your project, type the base character on the pasteboard and scale it as required, then position it in the working window and convert it to outlines as explained above, then make your modifications before saving as your custom font.