well this is an interesting take on things

I don't understand.

Even Yamato has her limits. If I was being used as a refrigerated pack mule I'd be pretty irritated too.

Steak said:

I don't understand.

It a Hotal Yamato thing.

I remember that Musashi never call Yamato is nee-san or something similiar.

Panzercracker said:

I remember that Musashi never call Yamato is nee-san or something similiar.

Yep. She addresses Yamato as just "Yamato".