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Mark (マーク,Māku?) is a 5 year old orphan who formerly resides in Grace Field House under the parental care of Isabella. Mark has average intelligence for his age, hence he was classified as one of the house's "low quality goods".
After his success of escaping Grace Field alongside 14 other orphans, Mark now seek to find William Minerva, whom he and her team believe can grant them the liberty to live a safe and peaceful life away from the demons.