Galaxina

Galaxina is Cosmo's older sister, shown to worry a great deal about Cosmo and their mother, Hertia. She is physically similar to Cosmo, but with teal features, and is portrayed as very smart, sophisticated, and down-to-earth - the opposite of the dreamy Cosmo. In the original Japanese version, Galaxina has no name; she was referred to as onee-sama ("big sister") by other members of her clan. She is voiced by Veronica Taylor in English.