User blog comment:Skeith9/Heroic Spirits Speculation/@comment-175.139.98.106-20140601005915/@comment-24754018-20140602095437

Maybe D-ish rank strength? Kind Arthur (who has B-Rank) fought numerous battles against powerful knights and monsters.

Mary, on the other hand, has very little (if any) combat experience, and was known for being sickly in her youth.

I doubt the two are really a match in the STR department.

I have an interview, so this is all I have time to say right now.