The thing is that Haruka is doing what she usually does: grossly misjudging a person based on conventional knowledge. That being that five year old girls do not typically rebuild engines, least of all by themselves.
Don’t get me wrong, Haruka definitely expected Alicia to be involved. And Alicia did need help picking out the rebuild kit because she was uncertain as to how much work the engine needed. But before she could go to anyone else, Haruka jumped in, mainly in an effort to try and connect with the girl. But she never expected for Alicia to suddenly take total charge of the project.
Also, this is Alicia’s way of telling Haruka to fuck off and mind her own business. Because even if she did know what she was doing, Alicia still didn’t want her help.
Don’t get me wrong, Haruka definitely expected Alicia to be involved. And Alicia did need help picking out the rebuild kit because she was uncertain as to how much work the engine needed. But before she could go to anyone else, Haruka jumped in, mainly in an effort to try and connect with the girl. But she never expected for Alicia to suddenly take total charge of the project.
Also, this is Alicia’s way of telling Haruka to fuck off and mind her own business. Because even if she did know what she was doing, Alicia still didn’t want her help.