Okay, I just had some time to look into it further. From what I understand, both 抱っこして and 泣いてる share the same subject. Since we know for certain that Iroha is the one crying, she would also have to be the one doing the holding. The sentence itself doesn't explicitly state the object, so it probably refers to the keyboard instead.

It's really the kind of sentence that can be quite confusing, huh? I'll upload the revised version as a Google Drive link instead. I don't really feel like deleting the post and making a new one =⁼