Seraphina (nicknamed Sera) is the deuteragonist of unORDINARY and best friend of John. She is a third-year student of Wellston High and is the first ranked student, who held the prestigious titles of Queen and later Ace. However, she temporarily lost this title during her ability loss, caused by the organization Spectre, which she worked for (under the name Asset 47) in order to falsely regain her ability, under the tutelage of her sister.