“Kodomo. Medicine!” He raised his voice in an annoyed matter. “I know it tastes bad but you need to take it!”

Because you had no name. Wanderer would call you different versions of kid depending on his mood.

“….’Kodomo’? Not ‘Kozou’? You tilted your head. Usually he called you a brat.

“You’re about to be kozou if you don’t listen to me.” He threatened.