The student council president of Kuou Academy and one of the two top-class devils in the school along with Rias. Rias' childhood friend, the two of them would often talk about girl stuff or family troubles in a special closed-dimensional sauna. The next head of the Sitri family, one of her greatest desires is to one day have a reigning game match with Rias.

As a member of the Sitri family, Sona seems to be an expert on how to make her family's famous oden noodles.