|Japanese Name||安永 (やすなが)|
|Debut||Episode 16 - The Idols' Dark Before Dawn|
|Voice Actor||John Swasey|
Yasunaga (安永 (やすなが)) is the butler for the Sono family.
In Episode 26, he is standing before Chieri's father's grave on Sagittariusstar as the concert on Akibastar is broadcasted on Zodiac Corporation's headquarters. At the end of the episode he is in the audience watching Chieri and the other members of NO NAME while holding both of Chieri's stuff alpacas.
- He has taken care of Chieri ever since she was a child.