|Date of Birth||Unknown|
|Story Debut||VnU Target 1|
Sonia has short dark hair and brown eyes. She is Arina's best friend and she cares about her, in fact, she always scolds the other classmates who don't leave her alone.
Not much is known about her, but it seems that she wants to help Arina in any way, she was the one to give her a hand to find out more about Alessandro.