User blog comment:Hitsuji Mamoru/Servant Creation Room 2 : Guess of the Who/@comment-28209103-20170725160621/@comment-30937535-20170725223602

If you hadn't excluded Saints, I would have brought up St. Francis of Assisi, especially due to stigmata.

That focus on evil traits is the key here I think. It makes me think of one who lived saintly, but was not recognised as such. Also the passive "At the Boundary" could be a big clue.

I still have several candidates in mind, but they don't really fit with all we know so far.

Still, I'll be throwing another one out: Dante Alighieri

He studied the works of many poets and philosophers, which could fit with the 2nd skill. The rest could be a reflection of his 'Divina Commedia'.