Monster explanation (Written by Luciliano):
Dark Emperor God’s Skeleton Knight
The race title of Bone Man, who has reached Rank 15. His appearance differs little from that of an ordinary Skeleton, but the hardness and flexibility of his bones surpasses that of Orichalcum.
If one considers the ‘Dark Emperor God’ to be Master, then it seems that Bone Man could now be considered as a heroic spirit who serves Master.
As if to prove that he has transcended the boundaries of ordinary Undead, anti-Undead light-attribute spells are now less effective against him than before.
Thus, given that he possesses a physical body, it is perhaps more accurate to categorize him as an Undead-type demigod or a demigod-type Undead.
With that said, it would be premature to decide Bone Man’s classification when he is the only one belonging to it. It is likely that other Undead like Bone Man will come into existence in the future; it would not be too late to decide upon the classification then.