Alessia Caro is an imperial noble and recent countess and wife to the count Marius Caro of Leyawiin. She is the daughter of Arriana Valga, the countess of Chorrol.
Alessia and her husband Marius both have strong support for trans-Nibenean traditions and thus despise all argonian, khajiit, and dunmer. A political point of view that pleases and disgusts the staff at the castle and the locals of Leyawiin depending on race.
During the Ahdarji's Heirloom quest you must steal her ring which she puts in a special box after an argonian previously tried to take it.