I think WHO in the background was exactly the reason she went beet red.I think it's interesting that she was more concerned about her sister changing the background, rather than WHO the background was.
I appreciate your logistics jokeBig sister is shipping harder than Maersk Line.
Imagine being deaf, but in return you can use ki like a Dragon Ball character.
(Also RIP Akira Toriyama)
IIRC the Hadoken was partially inspired by the Kamehameha, so we can still count it :VLast panel. I guess it is mangaka's way to pay respect.
Edit: fuck. It is Hadoken not Kamehameha.