Not as diverse as the sisters of SisPri do it, but nice none the less.
...Nii-sanAniki...Aniki-?You say you are glad you married Mutsuki...?Admiral... What's gotten into you all of a sudden? Oyo?Thing that's great about having married Mutsuki-chan
All of the following are ways to say older brotherOnii-chanβ‘Nii~chan!!Nii-san...Onii~Cha~nA...Nii-chan!!Onii-sanNii~niβ