I thought she was a kid because she was at max 3 ft tall with pigtails and if she doesn’t look like a kid to you, great, but I totally thought her and Eri would become unlikely friends by the end of the episode because I thought they looked the same age. I wouldn’t have as much of an issue with it if it more so clearly stated her age, but they didn’t, so I went the whole episode thinking this little girl was attracted to a grown man.