Ilana

A gold-ranked cleric, one of the highest adventurers in the kingdom of Blansys. She is a kind-hearted, well-mannered person who wishes for peace in the kingdom. However, deep inside, she harbors unspeakably dark desires. Her harsh training as an agent of God's will has left an indelible impact on her, and may have served to refine and even amplify these violent thoughts, even if their target has been shifted by the teachings of God.

She was an orphan who grew up with Reiter in Grand Moryn's orphanage.
From the age of 10, she was taken on as a disciple by the Prelate of Light. She was raised in seclusion within the Grand Temple halls and underwent intense training in the ways of the divine. This upbringing affected her mind a bit, so she’s more than a little clingy and jealous after being separated from Reiter.
Secretly, she has always borne bloody thoughts and wished to have Reiter all to herself at any cost. Sensing this darkness in her heart, the Prelate urged her to turn her thoughts against the forces of the Demon King and other enemies of the church, which has tenuously stayed her hand until now.
She completed her training at age 18 and joined Reiter and Triona on their return to the city, forming a decently-balanced team.
She sometimes "forgets" to clean demon blood off of her mace until reminded. Her eyes have been observed to go dull as she looks upon her handiwork and laughs to herself.
Don't make it too obvious you idiot

Oh, this blood on my mace? As my teacher always says, divine mercy does not extend to demons. Sinners must be hunted down and punished without exception in whatever dark corners they hide in. It's merely the will of God... I've already exterminated many demons myself, but I hope I can kill many more. I wish I could kill every single demon out there. It would make the world a much more beautiful place. Don't you agree?

no, this is too obvious. but i dont wanna delete it

What? This blood? ... Oh, I didn't even notice. Thank you for telling me. Don't worry, it's just a demon's blood... I've had to clean off much deeper bloodstains before. Reiter usually reminds me to clean up after myself... I don't really know why he cares so much, but I do it anyway, just for him.