Mina

Mina is the former member of the hero party until Arios' betrayal towards her and the others as well he was stripped as a hero.

Due to Arios' purely evilness, Mina betrayed Arios and joined Rein on killing Arios where she died along with the archbishop during the war against the demons and Arios himself.

Personality
Mina acts like a wise and thoughtful person but thinking Arios Orlando is the only one who can take down the demon lord makes her mindlessly follow and aide him in the journey which led her to ignorantly deem Rein Shroud useless. She is very conceited thinking she knows and is better than commoners even after her first defeat at the hand's Rein's party member.

However, she was devastated by Arios' betrayal. After Arios' second defeat by Rein, Mina developed her hatred towards Arios and viewed him as a traitor. Realizing of Arios' true filthy nature after both Leanne's and Aggath's deaths, Mina (like Aggath) betrayed Arios and join forces with Rein and his companions of wanting Arios dead where she and the Holy Church's archbishop died during the war against the demons.