Medicine Pocket is a boy or girl?

I really like this character’s design. At first, when I got her, I always thought she was a woman. But with her voice sounding like she’s trying to imitate a boy and the outfit I bought, her chest as being very flat (it’s like she doesn’t even have a chest).

I didn’t think much of it back then because I assumed she was just a tomboyish girl. However, when I listened to her Japanese voice, HER VOICE IS MALE!!? That completely shocked me. I couldn’t believe that my "wife" had turned into my "husband"! So, is this character actually male or female? TwT