User blog comment:BMHKain/BMHKain's Planned Fights./@comment-27255656-20160816133242/@comment-25968390-20160816163410

It is none of the obvious. Hint 3 implies that it is a rivalry/enemyship that has been going on since at least the 1880s. But only now is allowed to be called an actual fight. Hint 2 implies that character is from the same verse as this rivalry in a way...

Now you know. Good luck...