The main character's name is on each save file in the list. Makes you wonder...While we're at it, the option to play as Alma or Ixia would be cool
I can't even fathom how much work was done just for Noel's pixel art alone though, let alone the additional art needed for alternate costumes and more characters. But given there's a Change Costume spot, at least 1 more costume is probably planned, so maybe Alma and Ixia aren't a giant stretch beyond that.
Separately (but also about the art), I tried an early version of AiC briefly, and finally played through it just now. I'm in love between the setting, art, music, and characters. Just on the pixel art, oh my god. I've never been one to rave about how pretty a video game is, so I'm surprised at how much I enjoy looking at the beautiful backgrounds of the Witch's Shop area and the detailed outfits and cute animations of Noel and her friends.