Seraphina is a student of Wellston High and one of the main protagonists of the unOrdinary. She is the strongest student in Wellston . She's John's best friend and was also the school's Ace and former Queen.  Seraphina has a rather relaxed personality and doesn't really care for much. She often finds herself bored due to how good she is at practically everything. She can get very assertive with people who get into her business, going so far as freezing time around them. Around John however, Seraphina tends to be playfully sarcastic, though she does look up to her "crippled" friend. She's also unfazed by horror movies and takes pleasure in freezing John so she take a picture of him being scared.

In the past, Seraphina always strove to be perfect in the eyes of others and did not tolerate anyone getting in her way, but she did harbor doubts on the purpose of being perfect. After meeting John, she realizes that it doesn't matter what others think of her and stops trying to be perfect